[OpenSIPS-Devel] [ opensips-Bugs-3492500 ] Caller doesn\'t hear ringing in ear when using append_branch

[SourceForge.net]

Bugs item #3492500, was opened at 2012-02-23 15:26
Message generated for change (Settings changed) made by duanelarson123
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=1086410&aid=3492500&group_id=232389

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: core
Group: trunk
Status: Open
Resolution: None
>Priority: 1
Private: No
Submitted By: Duane Larson (duanelarson123)
Assigned to: Nobody/Anonymous (nobody)
Summary: Caller doesn\'t hear ringing in ear when using append_branch 

Initial Comment:
I posted this on the mailing list.  Here is a link that explains the issue

http://opensips-open-sip-server.1449251.n2.nabble.com/Caller-doesn-t-hear-ringing-in-ear-when-using-append-branch-and-serial-branches-next-branches-td7276788.html

I tried to attach the OpenSIPS syslog debug but it was too big.


----------------------------------------------------------------------

Comment By: Muhammad Shahzad (shari_786pk)
Date: 2012-02-24 03:34

Message:
The only difference i see in your SIP trace is that for first call your
media server sends 183 Early Media, while for second call (after 1st times
out) your media server sends 180 Ringing instead of 183. 

The difference between the two sip responses is that in case of 183 Early
Media, remote ring back tone is sent by callee endpoint in form of inbound
audio. While in case of 180 Ringing, there is no remote ring back tone and
the caller endpoint suppose to play some local ring back tone to give audio
feedback to the caller. 

Therefore, it appears that your caller endpoint does not support local ring
back tone, that's why you don't get any ring back. 

For workaround, you can force your media server (if a media server is
really involved), to send 183 early media instead of 180 ringing reply for
each invite.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=1086410&aid=3492500&group_id=232389