[asterisk-bugs] [Asterisk 0010441]: RTCP Read Too Short generate strange DTMF tones on call.

[noreply at bugs.digium.com]

The following issue requires your FEEDBACK. 
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http://bugs.digium.com/view.php?id=10441 
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Reported By:                ygor
Assigned To:                
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Project:                    Asterisk
Issue ID:                   10441
Category:                   Core/RTP
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.4.10  
SVN Branch (only for SVN checkouts, not tarball releases):  1.4  
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             08-13-2007 13:24 CDT
Last Modified:              08-14-2007 16:01 CDT
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Summary:                    RTCP Read Too Short generate strange DTMF tones on
call.
Description: 
Randomly Asterisk starts to issue messages like that:

[2007-08-13 15:33:54] WARNING[31849]: rtp.c:887 ast_rtcp_read: RTCP Read
too short

and the people hears some DTMF tones on the line.

We have detected that this occurs generally on Linksys PAP2-NA and Linksys
PAP2-T when using G729 codec.

Also I got this trouble on some IAX2 gsm trunks.

It appears to be randomly generated and sometimes it floods the CLI with
this message. ( generally when somebody inject DTMF tones on the call ).

This issue can be directly linked to the following Asterisk Forum post:
http://forums.digium.com/viewtopic.php?t=13114&highlight=&sid=949335ae5d5eddc10771bea0d7443599

Also from time to time, I get the "RTP Read Too Short" message too.

No jitterbuffers are used on my environment at the moment.
My asterisks are trunked on a voice-only network ( Motorola Canopy ).
There is absolutely no packet losses between the servers.
My environment is mixed, so I have SIP and IAX2 connections coming from
several places.
I generally use alaw, g729a and gsm codecs.
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---------------------------------------------------------------------- 
 file - 08-14-07 16:01  
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rtp and rtcp debug is required before this can be looked at. RTCP itself
does not carry audio or DTMF either... so I doubt that is the cause. 

Issue History 
Date Modified   Username       Field                    Change               
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08-14-07 16:01  file           Note Added: 0068844                          
08-14-07 16:01  file           Status                   new => feedback     
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