[asterisk-bugs] [Asterisk 0011483]: Asterisk rejects legitimate G.729a call with 488 Not Acceptable Here

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=11483 
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Reported By:                revolution
Assigned To:                
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Project:                    Asterisk
Issue ID:                   11483
Category:                   Core/RTP
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.15  
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:             12-06-2007 09:33 CST
Last Modified:              12-06-2007 14:26 CST
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Summary:                    Asterisk rejects legitimate G.729a call with 488 Not
Acceptable Here
Description: 
Linksys/Sipura brand phones send rtpmap:18 as G729a (other brands may as
well). Although technically legitimate and correct, INVITE is being
rejected with 488 Not acceptable here -- i.e. no compatible codecs despite
the fact that realtime sip peer is set to allow g729.

After going into Linksys/Sipura SPA-941 (as well as SPA-2100) and altering
name of rtpmap:18 to G729 (sans the a) -- call was accepted and completed
as expected.

Attaching two capture files (for the rejected call and the accepted call)
as well as a patch to rtp.c which seems to fix this minor issue (mostly
just an annoyance).
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 revolution - 12-06-07 14:26  
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full - Asterisk rejecting the INVITE b/c rtpmap:18 = G729a
full2 - Asterisk accepting the INVITE after editing rtpmap:18 to G729
full3 - (patched) Asterisk accepting the INVITE with rtpmap:18 = G729a 

Issue History 
Date Modified   Username       Field                    Change               
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12-06-07 14:26  revolution     Note Added: 0074944                          
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