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-rw-r--r--channels/sig_pri.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/channels/sig_pri.c b/channels/sig_pri.c
index 9f3ebb7be..bab7ae4d2 100644
--- a/channels/sig_pri.c
+++ b/channels/sig_pri.c
@@ -5063,6 +5063,10 @@ static void *pri_dchannel(void *vpri)
break;
case PRI_EVENT_ANSWER:
if (sig_pri_is_cis_call(e->answer.channel)) {
+#if defined(HAVE_PRI_CALL_WAITING)
+ /* Call is CIS so do normal CONNECT_ACKNOWLEDGE. */
+ pri_connect_ack(pri->pri, e->answer.call, 0);
+#endif /* defined(HAVE_PRI_CALL_WAITING) */
sig_pri_handle_cis_subcmds(pri, e->e, e->answer.subcmds,
e->answer.call);
break;