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-rw-r--r--configs/sip.conf.sample6
1 files changed, 6 insertions, 0 deletions
diff --git a/configs/sip.conf.sample b/configs/sip.conf.sample
index 7170e7e57..ab6cee97a 100644
--- a/configs/sip.conf.sample
+++ b/configs/sip.conf.sample
@@ -265,6 +265,12 @@ srvlookup=yes ; Enable DNS SRV lookups on outbound calls
; transmit such UPDATE messages to it, then you must enable this option.
; Otherwise, we will have to wait until we can send a reinvite to
; transmit the information.
+;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