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-rw-r--r--configs/sip.conf.sample7
1 files changed, 7 insertions, 0 deletions
diff --git a/configs/sip.conf.sample b/configs/sip.conf.sample
index 7bfcda987..2b260eb25 100644
--- a/configs/sip.conf.sample
+++ b/configs/sip.conf.sample
@@ -208,6 +208,13 @@ srvlookup=yes ; Enable DNS SRV lookups on outbound calls
;relaxdtmf=yes ; Relax dtmf handling
;trustrpid = no ; If Remote-Party-ID should be trusted
;sendrpid = yes ; If Remote-Party-ID should be sent
+;prematuremedia=no ; Some ISDN links send empty media frames before
+ ; the call is in ringing or progress state. The SIP
+ ; channel will then send 183 indicating early media
+ ; which will be empty - thus users get no ring signal.
+ ; Setting this to "no" will stop any media before we have
+ ; call progress. Default is "yes".
+
;progressinband=never ; If we should generate in-band ringing always
; use 'never' to never use in-band signalling, even in cases
; where some buggy devices might not render it