[asterisk-bugs] [Asterisk 0013045]: No voice joining snom 190 through asterisk to cisco voice gateway occationally.

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13045 
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Reported By:                kactus
Assigned To:                
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Project:                    Asterisk
Issue ID:                   13045
Category:                   Channels/chan_sip/CodecHandling
Reproducibility:            sometimes
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.17 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             2008-07-10 03:48 CDT
Last Modified:              2008-08-06 02:31 CDT
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Summary:                    No voice joining snom 190 through asterisk to cisco
voice gateway occationally.
Description: 
Hello

I have a asterisk 1.4.17 box which I have configured to troubleshoot case
12708 and while it resolves that issue, I have come across a concerning bug
that has now occured 3 times in 1.5 days of testing. 

I have a snom 190 talking to asterisk via sip, talking to a cisco voice
gateway via sip. Everything is in realtime talking via odbc and freetds to
a mssql db. 

Calling out works fine most of the time however occationally (3 times)
when I call, the call connects, but no voice traverses in either
direction.

I will attach two sip debugs as I was able to catch it in action, but
please note that rtp debug and rtcp debug was not turned on until part way
through on the broken one. 

Things I noticed: when the first "invite sip" occurs on the broken one, it
does not pass media  or media atributes. Later on it adds ilbc to the
supported codecs and sets mode to 30ms.
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 (0091134) kactus (reporter) - 2008-08-06 02:31
 http://bugs.digium.com/view.php?id=13045#c91134 
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Hello everyone, 

Have replaced the hardware and left it running for a while. We do not get
the dead calls running IAX to asterisk 1.4.17 sip gateway.

Feel free to close this case unless you want to keep it here for the sip
sdp invite issue which occured above, though this may have been resolved in
later versions. We have worked around that issue by simply forcing the
codecs to what the end device supports. 

We were previously allowing alaw,ulaw,gsm,ilbc and I beleive since the
snom 190 does not support ilbc that when it invited without advertising its
available codecs this is where the problem stemed from. Removing ILBC from
the list has meant that we do not get the dead air on the sip line. 

Issue History 
Date Modified    Username       Field                    Change               
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2008-08-06 02:31 kactus         Note Added: 0091134                          
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