[asterisk-bugs] [Asterisk 0011489]: During call setup signalling asterisk does not offer telephone-event (rfc2833) anymore

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=11489 
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Reported By:                macbrody
Assigned To:                
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Project:                    Asterisk
Issue ID:                   11489
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   block
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.4.15  
SVN Branch (only for SVN checkouts, not tarball releases): N/A  
SVN Revision (number only!): 91736 
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             12-07-2007 07:36 CST
Last Modified:              12-10-2007 12:21 CST
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Summary:                    During call setup signalling asterisk does not offer
telephone-event (rfc2833) anymore
Description: 
What happened:
As of asterisk-1.4.15 (tested trunk too) asterisk, when
connected to a peer via sip trunk does not recognize dtmf
anymore (same config worked with 1.4.13).

What I found:
During signalling negotiation at call setup in the sdp body,
asterisk does not offer the rtpmap: telephone-event anymore,
even if I configure dtmfmode=rfc2833.

Therefore the other end will not send any rfc2833 specific rtp events.

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---------------------------------------------------------------------- 
 macbrody - 12-10-07 12:21  
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file, eliel,

I see your point. As it is not an internal issue, but the connection to
the only big provider (cablecom) in switzerland officially supporting
asterisk, would one of the following scenarios be acceptable to digium?

1) a patch for forcing asterisk to send and use the telephone-event even
if the other side does not send it (backward compatibility).
2) supporting an implementation for cisco x-nse.

I do see that x-nse as cisco's proprietary solution may not seem too
attractive. Unfortunately just about all carriers/providers use cisco
equipment.

What do you suggest? 

Issue History 
Date Modified   Username       Field                    Change               
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12-10-07 12:21  macbrody       Note Added: 0075155                          
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