cosmetic: rename conn_fsm "bump" event to "release_when_unused"

The naming of "bump" was short and made sense to me at the time of writing, but
it is keeping pretty much everyone else at a distance, no-one intuitively gets
what it is supposed to mean.

Clarify by renaming to "release_when_unused".

Adjust test expectations.

Change-Id: I4dcc55f536f63b13a3da29fff1df5fe16751f83a

11 files changed, 526 insertions, 526 deletions

diff --git a/tests/msc_vlr/msc_vlr_test_authen_reuse.err b/tests/msc_vlr/msc_vlr_test_authen_reuse.err
index fc76e43ec..cda2bda9e 100644
--- a/tests/msc_vlr/msc_vlr_test_authen_reuse.err
+++ b/tests/msc_vlr/msc_vlr_test_authen_reuse.err
@@ -27,7 +27,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT, only one tuple; VLR sends Auth Req to MS
@@ -71,7 +71,7 @@ DVLR upd_hlr_vlr_fsm(901700000010650){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000000156f0
 DVLR upd_hlr_vlr_fsm(901700000010650){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   gsup_tx_confirmed == 1
   lu_result_sent == 0
@@ -155,8 +155,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -209,7 +209,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -243,10 +243,10 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 1
 - a USSD request is serviced
@@ -263,8 +263,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -313,7 +313,7 @@ DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 0
@@ -364,10 +364,10 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 1
 - a USSD request is serviced
@@ -384,8 +384,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -455,7 +455,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT, only one tuple; VLR sends Auth Req to MS
@@ -495,7 +495,7 @@ DMM -> SECURITY MODE CONTROL IMSI:901700000010650
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   lu_result_sent == 0
@@ -595,8 +595,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -649,7 +649,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -675,7 +675,7 @@ DMM -> SECURITY MODE CONTROL MSISDN:42342
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   cm_service_result_sent == 0
@@ -696,8 +696,8 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
 - a USSD request is serviced
   expecting USSD:
@@ -713,8 +713,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -763,7 +763,7 @@ DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 0
@@ -806,7 +806,7 @@ DMM -> SECURITY MODE CONTROL MSISDN:42342
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   cm_service_result_sent == 0
@@ -827,8 +827,8 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
 - a USSD request is serviced
   expecting USSD:
@@ -844,8 +844,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -915,7 +915,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT, only one tuple; VLR sends Auth Req to MS
@@ -959,7 +959,7 @@ DVLR upd_hlr_vlr_fsm(901700000010650){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000000156f0
 DVLR upd_hlr_vlr_fsm(901700000010650){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   gsup_tx_confirmed == 1
   lu_result_sent == 0
@@ -1043,8 +1043,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1097,7 +1097,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -1131,10 +1131,10 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 1
 - a USSD request is serviced
@@ -1151,8 +1151,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1204,7 +1204,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -1238,10 +1238,10 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 1
 - a USSD request is serviced
@@ -1258,8 +1258,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1311,7 +1311,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -1345,10 +1345,10 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 1
 - a USSD request is serviced
@@ -1365,8 +1365,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1436,7 +1436,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT, only one tuple; VLR sends Auth Req to MS
@@ -1476,7 +1476,7 @@ DMM -> SECURITY MODE CONTROL IMSI:901700000010650
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   lu_result_sent == 0
@@ -1576,8 +1576,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1630,7 +1630,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -1656,7 +1656,7 @@ DMM -> SECURITY MODE CONTROL MSISDN:42342
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   cm_service_result_sent == 0
@@ -1677,8 +1677,8 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
 - a USSD request is serviced
   expecting USSD:
@@ -1694,8 +1694,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1747,7 +1747,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -1773,7 +1773,7 @@ DMM -> SECURITY MODE CONTROL MSISDN:42342
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   cm_service_result_sent == 0
@@ -1794,8 +1794,8 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
 - a USSD request is serviced
   expecting USSD:
@@ -1811,8 +1811,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1864,7 +1864,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -1890,7 +1890,7 @@ DMM -> SECURITY MODE CONTROL MSISDN:42342
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   cm_service_result_sent == 0
@@ -1911,8 +1911,8 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
 - a USSD request is serviced
   expecting USSD:
@@ -1928,8 +1928,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1999,7 +1999,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT, only one tuple; VLR sends Auth Req to MS
@@ -2043,7 +2043,7 @@ DVLR upd_hlr_vlr_fsm(901700000010650){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000000156f0
 DVLR upd_hlr_vlr_fsm(901700000010650){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   gsup_tx_confirmed == 1
   lu_result_sent == 0
@@ -2127,8 +2127,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -2178,7 +2178,7 @@ DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 0
@@ -2229,10 +2229,10 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 1
 - a USSD request is serviced
@@ -2249,8 +2249,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -2320,7 +2320,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT, only one tuple; VLR sends Auth Req to MS
@@ -2360,7 +2360,7 @@ DMM -> SECURITY MODE CONTROL IMSI:901700000010650
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   lu_result_sent == 0
@@ -2460,8 +2460,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -2511,7 +2511,7 @@ DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 0
@@ -2554,7 +2554,7 @@ DMM -> SECURITY MODE CONTROL MSISDN:42342
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   cm_service_result_sent == 0
@@ -2575,8 +2575,8 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
 - a USSD request is serviced
   expecting USSD:
@@ -2592,8 +2592,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
diff --git a/tests/msc_vlr/msc_vlr_test_call.err b/tests/msc_vlr/msc_vlr_test_call.err
index d13e4c283..9e86b148a 100644
--- a/tests/msc_vlr/msc_vlr_test_call.err
+++ b/tests/msc_vlr/msc_vlr_test_call.err
@@ -28,7 +28,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -68,7 +68,7 @@ DMM -> SECURITY MODE CONTROL IMSI:901700000010650
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   lu_result_sent == 0
@@ -152,8 +152,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -206,7 +206,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=1843a645b98d00005b2d666af46c45d9
 - ...expecting res=7db47cf7f81e4dc7
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -234,7 +234,7 @@ DMM -> SECURITY MODE CONTROL MSISDN:42342
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   cm_service_result_sent == 0
@@ -255,8 +255,8 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
 ---
 - a call is initiated
@@ -276,8 +276,8 @@ DCC Sending 'MNCC_SETUP_IND' to MNCC.
   MSC --> MNCC: callref 0x80000001: MNCC_SETUP_IND
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: CC
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: CC
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0xc)
 - MNCC says that's fine
 DMNCC receive message MNCC_CALL_PROC_REQ
@@ -312,8 +312,8 @@ DMNCC transmit message MNCC_SETUP_COMPL_IND
 DCC Sending 'MNCC_SETUP_COMPL_IND' to MNCC.
   MSC --> MNCC: callref 0x80000001: MNCC_SETUP_COMPL_IND
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: CC
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: CC
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0xc)
 ---
 - RTP stream goes ahead, not shown here.
@@ -328,8 +328,8 @@ DMNCC transmit message MNCC_DISC_IND
 DCC Sending 'MNCC_DISC_IND' to MNCC.
   MSC --> MNCC: callref 0x80000001: MNCC_DISC_IND
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: CC
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: CC
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0xc)
 DMNCC receive message MNCC_REL_REQ
 DCC (ti 08 sub 42342) Received 'MNCC_REL_REQ' from MNCC in state 12 (DISCONNECT_IND)
@@ -350,8 +350,8 @@ DCC (ti 08 sub MSISDN:42342) new state RELEASE_REQ -> NULL
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DREF MSISDN:42342: MSC conn use - trans_cc == 2 (0x6)
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -403,7 +403,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -443,7 +443,7 @@ DMM -> SECURITY MODE CONTROL IMSI:901700000010650
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   lu_result_sent == 0
@@ -527,8 +527,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -593,7 +593,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=1843a645b98d00005b2d666af46c45d9
 - ...expecting res=7db47cf7f81e4dc7
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   auth_request_sent == 1
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
@@ -618,7 +618,7 @@ DMM -> SECURITY MODE CONTROL MSISDN:42342
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
 - MS sends SecurityModeControl acceptance, VLR accepts, sends CC Setup
@@ -647,8 +647,8 @@ DMSC msc_tx 2 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: GSM48_MT_CC_SETUP: 0305
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: CC
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: CC
   paging_stopped == 1
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_CALL_CONF
 DREF MSISDN:42342: MSC conn use + dtap == 3 (0xe)
@@ -662,8 +662,8 @@ DCC Sending 'MNCC_CALL_CONF_IND' to MNCC.
   MSC --> MNCC: callref 0x423: MNCC_CALL_CONF_IND
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: CC
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: CC
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0xc)
 - Total time passed: 1.000023 s
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_ALERTING
@@ -676,8 +676,8 @@ DMNCC transmit message MNCC_ALERT_IND
 DCC Sending 'MNCC_ALERT_IND' to MNCC.
   MSC --> MNCC: callref 0x423: MNCC_ALERT_IND
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: CC
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: CC
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0xc)
 - Total time passed: 2.000046 s
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_CONNECT
@@ -689,8 +689,8 @@ DMNCC transmit message MNCC_SETUP_CNF
 DCC Sending 'MNCC_SETUP_CNF' to MNCC.
   MSC --> MNCC: callref 0x423: MNCC_SETUP_CNF
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: CC
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: CC
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0xc)
 DMNCC receive message MNCC_SETUP_COMPL_REQ
 DCC (ti 00 sub 42342) Received 'MNCC_SETUP_COMPL_REQ' from MNCC in state 8 (CONNECT_REQUEST)
@@ -711,8 +711,8 @@ DMNCC transmit message MNCC_DISC_IND
 DCC Sending 'MNCC_DISC_IND' to MNCC.
   MSC --> MNCC: callref 0x423: MNCC_DISC_IND
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: CC
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: CC
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0xc)
 DMNCC receive message MNCC_REL_REQ
 DCC (ti 00 sub 42342) Received 'MNCC_REL_REQ' from MNCC in state 12 (DISCONNECT_IND)
@@ -733,8 +733,8 @@ DCC (ti 00 sub MSISDN:42342) new state RELEASE_REQ -> NULL
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DREF MSISDN:42342: MSC conn use - trans_cc == 2 (0x6)
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
diff --git a/tests/msc_vlr/msc_vlr_test_gsm_authen.err b/tests/msc_vlr/msc_vlr_test_gsm_authen.err
index c2efa9e8a..c996f3fc8 100644
--- a/tests/msc_vlr/msc_vlr_test_gsm_authen.err
+++ b/tests/msc_vlr/msc_vlr_test_gsm_authen.err
@@ -27,7 +27,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -89,7 +89,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -141,8 +141,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -191,7 +191,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...rand=12aca96fb4ffdea5c985cbafa9b6e18b
 - ...expecting sres=20bde240
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -236,10 +236,10 @@ DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 1
 - a USSD request is serviced
@@ -256,8 +256,8 @@ DMM MSISDN:46071: MSISDN = 46071
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000004620){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -319,7 +319,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...rand=e7c03ba7cf0e2fde82b2dc4d63077d42
 - ...expecting sres=a29514ae
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   auth_request_sent == 1
 - needs auth, not yet accepted
@@ -370,10 +370,10 @@ DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   dtap_tx_confirmed == 1
   paging_stopped == 1
@@ -389,8 +389,8 @@ DREF MSISDN:46071: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -404,8 +404,8 @@ DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DREF MSISDN:46071: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000004620){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -476,7 +476,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -538,7 +538,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -621,8 +621,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -676,7 +676,7 @@ DVLR VLR_Authenticate(50462976){VLR_SUB_AS_WAIT_RESP}: got auth tuple: use_count
 - ...rand=12aca96fb4ffdea5c985cbafa9b6e18b
 - ...expecting sres=20bde240
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -721,10 +721,10 @@ DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEP
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 1
 - a USSD request is serviced
@@ -741,8 +741,8 @@ DMM MSISDN:46071: MSISDN = 46071
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(50462976){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -804,7 +804,7 @@ DVLR VLR_Authenticate(50462976){VLR_SUB_AS_WAIT_RESP}: got auth tuple: use_count
 - ...rand=e7c03ba7cf0e2fde82b2dc4d63077d42
 - ...expecting sres=a29514ae
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   auth_request_sent == 1
 - needs auth, not yet accepted
@@ -855,10 +855,10 @@ DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   dtap_tx_confirmed == 1
   paging_stopped == 1
@@ -874,8 +874,8 @@ DREF MSISDN:46071: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -889,8 +889,8 @@ DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DREF MSISDN:46071: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(50462976){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -939,7 +939,7 @@ DVLR VLR_Authenticate(50462976){VLR_SUB_AS_WAIT_RESP}: got auth tuple: use_count
 - sending GSM Auth Request for MSISDN:46071: tuple use_count=1 key_seq=3 auth_types=0x1 and...
 - ...rand=fa8f20b781b5881329d4fea26b1a3c51
 - ...expecting sres=5afc8d72
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   auth_request_sent == 1
   lu_result_sent == 0
@@ -968,7 +968,7 @@ DVLR upd_hlr_vlr_fsm(50462976){UPD_HLR_VLR_S_INIT}: Received Event UPD_HLR_VLR_E
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(50462976){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -1050,8 +1050,8 @@ DVLR vlr_lu_fsm(50462976){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(50462976){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1129,7 +1129,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1191,7 +1191,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -1272,8 +1272,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1349,7 +1349,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1411,7 +1411,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -1483,7 +1483,7 @@ DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: Received
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: lu_compl_vlr_new_tmsi()
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for MSISDN:46071, with TMSI 0x03020100
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
   llist_count(&net->subscr_conns) == 1
@@ -1523,8 +1523,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1600,7 +1600,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1643,7 +1643,7 @@ DVLR upd_hlr_vlr_fsm(901700000010650){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000000156f0
 DVLR upd_hlr_vlr_fsm(901700000010650){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -1695,8 +1695,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1745,7 +1745,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...rand=c187a53a5e6b9d573cac7c74451fd46d
 - ...expecting sres=85aa3130
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -1790,10 +1790,10 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 1
 - a USSD request is serviced
@@ -1810,8 +1810,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1873,7 +1873,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...rand=efa9c29a9742148d5c9070348716e1bb
 - ...expecting sres=69d5f9fb
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   auth_request_sent == 1
 - needs auth, not yet accepted
@@ -1924,10 +1924,10 @@ DMSC msc_tx 91 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0x14)
   dtap_tx_confirmed == 1
   paging_stopped == 1
@@ -1943,8 +1943,8 @@ DREF MSISDN:42342: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -1958,8 +1958,8 @@ DMSC msc_tx 2 bytes to MSISDN:42342 via RAN_GERAN_A
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DREF MSISDN:42342: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -2031,7 +2031,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
diff --git a/tests/msc_vlr/msc_vlr_test_gsm_ciph.err b/tests/msc_vlr/msc_vlr_test_gsm_ciph.err
index 49c00ec36..2d60ae9a7 100644
--- a/tests/msc_vlr/msc_vlr_test_gsm_ciph.err
+++ b/tests/msc_vlr/msc_vlr_test_gsm_ciph.err
@@ -27,7 +27,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -67,7 +67,7 @@ DMM -> CIPHER MODE COMMAND IMSI:901700000004620
 - ...perm algo: 2
 - ...key: 61855fb81fc2a800
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - needs ciph, not yet accepted
@@ -145,8 +145,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -195,7 +195,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...rand=12aca96fb4ffdea5c985cbafa9b6e18b
 - ...expecting sres=20bde240
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   auth_request_sent == 1
   cm_service_result_sent == 0
@@ -234,7 +234,7 @@ DMSC CLASSMARK 1 unknown, assuming MS supports A5/1
 - ...perm algo: 2
 - ...key: 07fa7502e07e1c00
 DVLR Process_Access_Request_VLR(901700000004620){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 0
   cipher_mode_cmd_sent == 1
@@ -265,8 +265,8 @@ DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
 - a USSD request is serviced
   expecting USSD:
@@ -282,8 +282,8 @@ DMM MSISDN:46071: MSISDN = 46071
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000004620){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -345,7 +345,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...rand=e7c03ba7cf0e2fde82b2dc4d63077d42
 - ...expecting sres=a29514ae
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   auth_request_sent == 1
 - needs auth, not yet accepted
@@ -383,7 +383,7 @@ DMSC CLASSMARK 1 unknown, assuming MS supports A5/1
 - ...perm algo: 2
 - ...key: e2b234f807886400
 DVLR Process_Access_Request_VLR(901700000004620){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   cipher_mode_cmd_sent == 1
 - needs ciph, not yet accepted
@@ -421,8 +421,8 @@ DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
@@ -437,8 +437,8 @@ DREF MSISDN:46071: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -452,8 +452,8 @@ DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DREF MSISDN:46071: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000004620){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -524,7 +524,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -564,7 +564,7 @@ DMM -> CIPHER MODE COMMAND IMSI:901700000004620
 - ...perm algo: 2
 - ...key: 61855fb81fc2a800
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
   auth_request_sent == 1
@@ -674,8 +674,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -729,7 +729,7 @@ DVLR VLR_Authenticate(50462976){VLR_SUB_AS_WAIT_RESP}: got auth tuple: use_count
 - ...rand=12aca96fb4ffdea5c985cbafa9b6e18b
 - ...expecting sres=20bde240
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   auth_request_sent == 1
   cm_service_result_sent == 0
@@ -768,7 +768,7 @@ DMSC CLASSMARK 1 unknown, assuming MS supports A5/1
 - ...perm algo: 2
 - ...key: 07fa7502e07e1c00
 DVLR Process_Access_Request_VLR(50462976){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 0
   cipher_mode_cmd_sent == 1
@@ -799,8 +799,8 @@ DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEP
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
 - a USSD request is serviced
   expecting USSD:
@@ -816,8 +816,8 @@ DMM MSISDN:46071: MSISDN = 46071
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(50462976){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -879,7 +879,7 @@ DVLR VLR_Authenticate(50462976){VLR_SUB_AS_WAIT_RESP}: got auth tuple: use_count
 - ...rand=e7c03ba7cf0e2fde82b2dc4d63077d42
 - ...expecting sres=a29514ae
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   auth_request_sent == 1
 - needs auth, not yet accepted
@@ -917,7 +917,7 @@ DMSC CLASSMARK 1 unknown, assuming MS supports A5/1
 - ...perm algo: 2
 - ...key: e2b234f807886400
 DVLR Process_Access_Request_VLR(50462976){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   cipher_mode_cmd_sent == 1
 - needs ciph, not yet accepted
@@ -955,8 +955,8 @@ DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
@@ -971,8 +971,8 @@ DREF MSISDN:46071: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -986,8 +986,8 @@ DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DREF MSISDN:46071: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(50462976){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1058,7 +1058,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1098,7 +1098,7 @@ DMM -> CIPHER MODE COMMAND IMSI:901700000004620
 - ...perm algo: 2
 - ...key: 61855fb81fc2a800
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - needs ciph, not yet accepted
@@ -1205,8 +1205,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1282,7 +1282,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1322,7 +1322,7 @@ DMM -> CIPHER MODE COMMAND IMSI:901700000004620
 - ...perm algo: 2
 - ...key: 61855fb81fc2a800
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   cipher_mode_cmd_sent == 1
   cipher_mode_cmd_sent_with_imeisv == 1
@@ -1421,8 +1421,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1495,7 +1495,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1535,7 +1535,7 @@ DMM -> CIPHER MODE COMMAND IMSI:901700000004620
 - ...perm algo: 2
 - ...key: 61855fb81fc2a800
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - needs ciph, not yet accepted
@@ -1633,7 +1633,7 @@ DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: Received
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: lu_compl_vlr_new_tmsi()
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for MSISDN:46071, with TMSI 0x03020100
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
   llist_count(&net->subscr_conns) == 1
@@ -1673,8 +1673,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1750,7 +1750,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends *UMTS AKA* Auth Req to MS
@@ -1791,7 +1791,7 @@ DMM -> CIPHER MODE COMMAND IMSI:901700000010650
 - ...perm algo: 2
 - ...key: 7a75f0ac9b844400
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - MS sends Ciphering Mode Complete, VLR accepts and sends GSUP LU Req to HLR
@@ -1857,8 +1857,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1908,7 +1908,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=78cdd96c60840000322f421b3bb778b1
 - ...expecting res=ed3ebf9cb6ea48ed
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -1947,7 +1947,7 @@ DMSC CLASSMARK 1 unknown, assuming MS supports A5/1
 - ...perm algo: 2
 - ...key: da149b11d473f400
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 0
   cipher_mode_cmd_sent == 1
@@ -1967,8 +1967,8 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
 - a USSD request is serviced
   expecting USSD:
@@ -1984,8 +1984,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -2048,7 +2048,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=53f3e5632b3d00008865dd54d49663f2
 - ...expecting res=86e848a9e7ad8cd5
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   auth_request_sent == 1
 - needs auth, not yet accepted
@@ -2086,7 +2086,7 @@ DMSC CLASSMARK 1 unknown, assuming MS supports A5/1
 - ...perm algo: 2
 - ...key: 26ec67fad3073000
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   cipher_mode_cmd_sent == 1
 - MS sends Ciphering Mode Complete, VLR accepts and sends pending SMS
@@ -2113,8 +2113,8 @@ DMSC msc_tx 91 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
@@ -2129,8 +2129,8 @@ DREF MSISDN:42342: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -2144,8 +2144,8 @@ DMSC msc_tx 2 bytes to MSISDN:42342 via RAN_GERAN_A
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DREF MSISDN:42342: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -2216,7 +2216,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
diff --git a/tests/msc_vlr/msc_vlr_test_hlr_reject.err b/tests/msc_vlr/msc_vlr_test_hlr_reject.err
index b5e89cc4b..5af4e64ec 100644
--- a/tests/msc_vlr/msc_vlr_test_hlr_reject.err
+++ b/tests/msc_vlr/msc_vlr_test_hlr_reject.err
@@ -27,7 +27,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _SEND_AUTH_INFO_ERROR = unknown IMSI
@@ -103,7 +103,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _SEND_AUTH_INFO_ERROR = net fail
@@ -181,7 +181,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -224,7 +224,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -276,8 +276,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -331,7 +331,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _SEND_AUTH_INFO_ERROR = net fail
@@ -374,7 +374,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -425,8 +425,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -484,7 +484,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -527,7 +527,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -579,8 +579,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -634,7 +634,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _SEND_AUTH_INFO_ERROR = net fail
@@ -712,7 +712,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -755,7 +755,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -807,8 +807,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -863,7 +863,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _SEND_AUTH_INFO_ERROR = unknown IMSI
@@ -939,7 +939,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT but it lacks auth tuples
@@ -1017,7 +1017,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends UPDATE_LOCATION_ERROR
@@ -1095,7 +1095,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends only _UPDATE_LOCATION_RESULT, no INSERT DATA
@@ -1136,8 +1136,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
diff --git a/tests/msc_vlr/msc_vlr_test_hlr_timeout.err b/tests/msc_vlr/msc_vlr_test_hlr_timeout.err
index 193dcf6d4..4d1a99f1f 100644
--- a/tests/msc_vlr/msc_vlr_test_hlr_timeout.err
+++ b/tests/msc_vlr/msc_vlr_test_hlr_timeout.err
@@ -28,7 +28,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 ---
@@ -115,7 +115,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
diff --git a/tests/msc_vlr/msc_vlr_test_ms_timeout.err b/tests/msc_vlr/msc_vlr_test_ms_timeout.err
index 952b1a7fa..c9259a878 100644
--- a/tests/msc_vlr/msc_vlr_test_ms_timeout.err
+++ b/tests/msc_vlr/msc_vlr_test_ms_timeout.err
@@ -28,7 +28,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -132,7 +132,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000004026f0
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -175,7 +175,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -227,8 +227,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -277,7 +277,7 @@ DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...rand=12aca96fb4ffdea5c985cbafa9b6e18b
 - ...expecting sres=20bde240
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -371,7 +371,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -423,8 +423,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
diff --git a/tests/msc_vlr/msc_vlr_test_no_authen.err b/tests/msc_vlr/msc_vlr_test_no_authen.err
index 5ccb5d485..cf34f628f 100644
--- a/tests/msc_vlr/msc_vlr_test_no_authen.err
+++ b/tests/msc_vlr/msc_vlr_test_no_authen.err
@@ -30,7 +30,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -94,8 +94,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -148,11 +148,11 @@ DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 1
 msc_subscr_conn_is_accepted() == true
@@ -170,8 +170,8 @@ DMM MSISDN:46071: MSISDN = 46071
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000004620){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -245,11 +245,11 @@ DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 5
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - compl_l3 == 2 (0x14)
   dtap_tx_confirmed == 1
   paging_stopped == 1
@@ -265,8 +265,8 @@ DREF MSISDN:46071: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -280,8 +280,8 @@ DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DREF MSISDN:46071: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000004620){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -355,7 +355,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -450,8 +450,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -509,11 +509,11 @@ DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEP
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 1
 msc_subscr_conn_is_accepted() == true
@@ -531,8 +531,8 @@ DMM MSISDN:46071: MSISDN = 46071
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(50462976){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -605,11 +605,11 @@ DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 5
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - compl_l3 == 2 (0x14)
   dtap_tx_confirmed == 1
   paging_stopped == 1
@@ -625,8 +625,8 @@ DREF MSISDN:46071: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -640,8 +640,8 @@ DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DREF MSISDN:46071: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(50462976){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -691,7 +691,7 @@ DVLR upd_hlr_vlr_fsm(50462976){UPD_HLR_VLR_S_INIT}: Received Event UPD_HLR_VLR_E
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(50462976){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -785,8 +785,8 @@ DVLR vlr_lu_fsm(50462976){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(50462976){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -867,7 +867,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -960,8 +960,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1040,7 +1040,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -1124,7 +1124,7 @@ DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: Received
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: lu_compl_vlr_new_tmsi()
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for MSISDN:46071, with TMSI 0x03020100
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
   llist_count(&net->subscr_conns) == 1
@@ -1157,8 +1157,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1231,7 +1231,7 @@ DMSC msc_tx 3 bytes to IMSI:901700000004620 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: GSM48_MT_MM_ID_REQ: 051803
 - DTAP matches expected message
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_IMEISV
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
 - MS replies with an Identity Response, causes LU to commence with a GSUP LU request to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
@@ -1251,7 +1251,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - Subscriber has the IMEISV from the ID Response
@@ -1319,8 +1319,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1389,7 +1389,7 @@ DMSC msc_tx 3 bytes to IMSI:901700000004620 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: GSM48_MT_MM_ID_REQ: 051803
 - DTAP matches expected message
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_IMEISV
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
 - MS replies with an Identity Response, causes LU to commence with a GSUP LU request to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
@@ -1409,7 +1409,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - Subscriber has the IMEISV from the ID Response
@@ -1506,8 +1506,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1579,7 +1579,7 @@ DMSC msc_tx 3 bytes to IMSI:901700000004620 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: GSM48_MT_MM_ID_REQ: 051803
 - DTAP matches expected message
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_IMEISV
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
 - MS replies with an Identity Response, causes LU to commence with a GSUP LU request to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
@@ -1599,7 +1599,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - Subscriber has the IMEISV from the ID Response
@@ -1698,8 +1698,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1742,7 +1742,7 @@ DMSC msc_tx 3 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: GSM48_MT_MM_ID_REQ: 051803
 - DTAP matches expected message
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_IMEISV
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
 - MS replies with an Identity Response, causes LU to commence with a GSUP LU request to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
@@ -1762,7 +1762,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - Subscriber has the IMEISV from the ID Response
@@ -1860,8 +1860,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1935,7 +1935,7 @@ DMSC msc_tx 3 bytes to IMSI:901700000004620 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: GSM48_MT_MM_ID_REQ: 051803
 - DTAP matches expected message
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_IMEISV
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
 - MS replies with an Identity Response, causes LU to commence with a GSUP LU request to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
@@ -1955,7 +1955,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - Subscriber has the IMEISV from the ID Response
@@ -2043,7 +2043,7 @@ DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: Received
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: lu_compl_vlr_new_tmsi()
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for MSISDN:46071, with TMSI 0x03020100
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
   llist_count(&net->subscr_conns) == 1
@@ -2076,8 +2076,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
diff --git a/tests/msc_vlr/msc_vlr_test_reject_concurrency.err b/tests/msc_vlr/msc_vlr_test_reject_concurrency.err
index 8e07154e8..17e8c8933 100644
--- a/tests/msc_vlr/msc_vlr_test_reject_concurrency.err
+++ b/tests/msc_vlr/msc_vlr_test_reject_concurrency.err
@@ -30,7 +30,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -126,8 +126,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -186,7 +186,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -196,7 +196,7 @@ DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
 DREF IMSI:901700000004620: MSC conn use + dtap == 2 (0x6)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM 901700000004620: Error: connection already in use
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -251,8 +251,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -311,7 +311,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -326,7 +326,7 @@ DMM -> CM SERVICE Reject cause: 17
 DMSC msc_tx 3 bytes to IMSI:901700000004620 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: GSM48_MT_MM_CM_SERV_REJ: 052211
 - DTAP matches expected message
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
   cm_service_result_sent == 0
@@ -382,8 +382,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -442,7 +442,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -453,7 +453,7 @@ DREF IMSI:901700000004620: MSC conn use + dtap == 2 (0x6)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000004620
 DMM 901700000004620: Error: connection already in use
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -508,8 +508,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -570,7 +570,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -623,8 +623,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -677,11 +677,11 @@ DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 1
 msc_subscr_conn_is_accepted() == true
@@ -690,8 +690,8 @@ msc_subscr_conn_is_accepted() == true
 DREF MSISDN:46071: MSC conn use + dtap == 2 (0x6)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM 901700000004620: Error: connection already in use
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -763,7 +763,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -816,8 +816,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -870,11 +870,11 @@ DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 1
 msc_subscr_conn_is_accepted() == true
@@ -885,8 +885,8 @@ DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM MSISDN:46071: re-using already accepted connection
 - sending CM Service Accept for MSISDN:46071
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 1
   llist_count(&net->subscr_conns) == 1
@@ -958,7 +958,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -1011,8 +1011,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1065,11 +1065,11 @@ DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 1
 msc_subscr_conn_is_accepted() == true
@@ -1080,8 +1080,8 @@ DREF MSISDN:46071: MSC conn use + dtap == 2 (0x6)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000004620
 DMM 901700000004620: Error: connection already in use
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   llist_count(&net->subscr_conns) == 1
 ---
@@ -1100,8 +1100,8 @@ DMM MSISDN:46071: MSISDN = 46071
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000004620){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1159,7 +1159,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -1212,8 +1212,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1285,11 +1285,11 @@ DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 5
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - compl_l3 == 2 (0x14)
   dtap_tx_confirmed == 1
   paging_stopped == 1
@@ -1301,8 +1301,8 @@ DREF MSISDN:46071: MSC conn use - compl_l3 == 2 (0x14)
 DREF MSISDN:46071: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM 901700000004620: Error: connection already in use
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -1312,8 +1312,8 @@ DREF MSISDN:46071: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -1327,8 +1327,8 @@ DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DREF MSISDN:46071: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000004620){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1387,7 +1387,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -1440,8 +1440,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1513,11 +1513,11 @@ DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 5
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - compl_l3 == 2 (0x14)
   dtap_tx_confirmed == 1
   paging_stopped == 1
@@ -1531,8 +1531,8 @@ DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM MSISDN:46071: re-using already accepted connection
 - sending CM Service Accept for MSISDN:46071
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   cm_service_result_sent == 1
   llist_count(&net->subscr_conns) == 1
@@ -1543,8 +1543,8 @@ DREF MSISDN:46071: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -1558,8 +1558,8 @@ DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DREF MSISDN:46071: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:46071: MSC conn use - dtap == 1 (0x4)
   dtap_tx_confirmed == 1
 - SMS is done
@@ -1632,7 +1632,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
@@ -1685,8 +1685,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1758,11 +1758,11 @@ DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 5
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - compl_l3 == 2 (0x14)
   dtap_tx_confirmed == 1
   paging_stopped == 1
@@ -1775,8 +1775,8 @@ DREF MSISDN:46071: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000004620
 DMM 901700000004620: Error: connection already in use
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
@@ -1784,8 +1784,8 @@ DREF MSISDN:46071: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:46071: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -1799,8 +1799,8 @@ DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DREF MSISDN:46071: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000004620){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
diff --git a/tests/msc_vlr/msc_vlr_test_rest.err b/tests/msc_vlr/msc_vlr_test_rest.err
index 1b7d2fdfd..73a369251 100644
--- a/tests/msc_vlr/msc_vlr_test_rest.err
+++ b/tests/msc_vlr/msc_vlr_test_rest.err
@@ -117,7 +117,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -181,8 +181,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -234,7 +234,7 @@ DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM MSISDN:46071: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:46071: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -297,8 +297,8 @@ DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -367,7 +367,7 @@ DVLR vlr_lu_fsm(591536962){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_IMSI
 DMSC msc_tx 3 bytes to TMSI:0x23422342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: GSM48_MT_MM_ID_REQ: 051801
 - DTAP matches expected message
-DMM TMSI:0x23422342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM TMSI:0x23422342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF TMSI:0x23422342: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 msc_subscr_conn_is_accepted() == false
@@ -399,7 +399,7 @@ DVLR upd_hlr_vlr_fsm(591536962){UPD_HLR_VLR_S_INIT}: Received Event UPD_HLR_VLR_
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(591536962){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000004620: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000004620: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x4)
   lu_result_sent == 0
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
@@ -463,8 +463,8 @@ DVLR vlr_lu_fsm(591536962){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(591536962){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(591536962){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(591536962){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(591536962){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(591536962){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(591536962){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(591536962){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(591536962){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(591536962){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(591536962){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
diff --git a/tests/msc_vlr/msc_vlr_test_umts_authen.err b/tests/msc_vlr/msc_vlr_test_umts_authen.err
index 7910f1ca6..fa820f72c 100644
--- a/tests/msc_vlr/msc_vlr_test_umts_authen.err
+++ b/tests/msc_vlr/msc_vlr_test_umts_authen.err
@@ -27,7 +27,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -71,7 +71,7 @@ DVLR upd_hlr_vlr_fsm(901700000010650){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000000156f0
 DVLR upd_hlr_vlr_fsm(901700000010650){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   gsup_tx_confirmed == 1
   lu_result_sent == 0
@@ -155,8 +155,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -204,7 +204,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=1843a645b98d00005b2d666af46c45d9
 - ...expecting res=7db47cf7f81e4dc7
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -249,10 +249,10 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   cm_service_result_sent == 1
 - a USSD request is serviced
@@ -269,8 +269,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -333,7 +333,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=f9375e6d41e1000096e7fe4ff1c27e39
 - ...expecting res=706f996719ba609c
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   auth_request_sent == 1
 - needs auth, not yet accepted
@@ -384,10 +384,10 @@ DMSC msc_tx 91 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0x14)
   dtap_tx_confirmed == 1
   paging_stopped == 1
@@ -403,8 +403,8 @@ DREF MSISDN:42342: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -418,8 +418,8 @@ DMSC msc_tx 2 bytes to MSISDN:42342 via RAN_GERAN_A
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DREF MSISDN:42342: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -490,7 +490,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -530,7 +530,7 @@ DMM -> SECURITY MODE CONTROL IMSI:901700000010650
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   lu_result_sent == 0
@@ -630,8 +630,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -679,7 +679,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=1843a645b98d00005b2d666af46c45d9
 - ...expecting res=7db47cf7f81e4dc7
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   cm_service_result_sent == 0
   auth_request_sent == 1
@@ -716,7 +716,7 @@ DMM -> SECURITY MODE CONTROL MSISDN:42342
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   cm_service_result_sent == 0
@@ -737,8 +737,8 @@ DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_CM_SERVICE_REQ
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: received_cm_service_request = true
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: still awaiting first request after a CM Service Request
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
 - a USSD request is serviced
   expecting USSD:
@@ -754,8 +754,8 @@ DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -818,7 +818,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: got auth tuple: us
 - ...autn=f9375e6d41e1000096e7fe4ff1c27e39
 - ...expecting res=706f996719ba609c
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - compl_l3 == 1 (0x4)
   auth_request_sent == 1
 - needs auth, not yet accepted
@@ -854,7 +854,7 @@ DMM -> SECURITY MODE CONTROL MSISDN:42342
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=eb50e770ddcc3060101d2f43b6c2b884
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DMM MSISDN:42342: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM MSISDN:42342: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF MSISDN:42342: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   paging_stopped == 0
@@ -883,8 +883,8 @@ DMSC msc_tx 91 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
 DREF VLR subscr MSISDN:42342 usage increases to: 5
@@ -898,8 +898,8 @@ DREF MSISDN:42342: MSC conn use + dtap == 3 (0x16)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: connection still has active transaction: SMS
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: connection still has active transaction: SMS
 DREF MSISDN:42342: MSC conn use - dtap == 2 (0x14)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
@@ -913,8 +913,8 @@ DMSC msc_tx 2 bytes to MSISDN:42342 via RAN_UTRAN_IU
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DREF MSISDN:42342: MSC conn use - trans_sms == 2 (0x6)
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR Process_Access_Request_VLR(901700000010650){PR_ARQ_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -985,7 +985,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1013,7 +1013,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR
 DVLR GSUP tx: 08010809710000000156f0260e979498b1f72d3e28c59fa2e72f9c201039fa2f4e3d523d8619a73b4f65c3e14d
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0260e979498b1f72d3e28c59fa2e72f9c201039fa2f4e3d523d8619a73b4f65c3e14d
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_SAI_RESYNC
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   gsup_tx_confirmed == 1
   auth_request_sent == 0
@@ -1059,7 +1059,7 @@ DVLR upd_hlr_vlr_fsm(901700000010650){UPD_HLR_VLR_S_INIT}: Received Event UPD_HL
 DVLR GSUP tx: 04010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000000156f0
 DVLR upd_hlr_vlr_fsm(901700000010650){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   gsup_tx_confirmed == 1
   lu_result_sent == 0
@@ -1143,8 +1143,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1198,7 +1198,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1226,7 +1226,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR
 DVLR GSUP tx: 08010809710000000156f0260e979498b1f72d3e28c59fa2e72f9c201039fa2f4e3d523d8619a73b4f65c3e14d
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0260e979498b1f72d3e28c59fa2e72f9c201039fa2f4e3d523d8619a73b4f65c3e14d
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_SAI_RESYNC
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   gsup_tx_confirmed == 1
   auth_request_sent == 0
@@ -1268,7 +1268,7 @@ DMM -> SECURITY MODE CONTROL IMSI:901700000010650
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=8a90c769b7272f3bb7a1c1fbb1ea9349
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x4)
   security_mode_ctrl_sent == 1
   lu_result_sent == 0
@@ -1368,8 +1368,8 @@ DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: state_chg to VLR_ULA_
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: SUBSCR_CONN_FROM_LU
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
-DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: bump: releasing conn
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_RELEASE_WHEN_UNUSED
+DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_release_when_unused: releasing conn
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
 DVLR vlr_lu_fsm(901700000010650){VLR_ULA_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1423,7 +1423,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1517,7 +1517,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1611,7 +1611,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1705,7 +1705,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1799,7 +1799,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
@@ -1893,7 +1893,7 @@ DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: Received Event VL
 DVLR GSUP tx: 08010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
-DMM IMSI:901700000010650: bump: conn still being established (SUBSCR_CONN_S_NEW)
+DMM IMSI:901700000010650: subscr_conn_release_when_unused: conn still being established (SUBSCR_CONN_S_NEW)
 DREF IMSI:901700000010650: MSC conn use - compl_l3 == 1 (0x4)
   lu_result_sent == 0
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS