[asterisk-bugs] [Asterisk 0011740]: DTMF problem on 1.4.17

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=11740 
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Reported By:                gserra
Assigned To:                
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Project:                    Asterisk
Issue ID:                   11740
Category:                   Channels/chan_sip/Interoperability
Reproducibility:            always
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:             01-11-2008 05:55 CST
Last Modified:              02-11-2008 15:33 CST
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Summary:                    DTMF problem on 1.4.17
Description: 
Hi,

when a call is being passed over from AS5400 via PRI to SIP into asterisk,
dtmf is working in 1.4.11 but not on 1.4.17
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---------------------------------------------------------------------- 
 aragon - 02-11-08 15:33  
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Hi Dimas,

You were right on some issues regarding SIP INFO
Both endpoints must support SIP INFO before DTMF will be passed even if
re-invite is disabled.
At least this was the case in my testing between Snom 360 v7.1.30 and
Aastra 480i v1.4.2.3000
When both phones were configured for SIP INFO method I got automon and
atxfer to work.
And this is where things got strange...
I could not suppress DTMF to the remote party when I invoked automon using
SIP INFO.
I could suppress DTMF to the remote party when I invoked automon using
rfc2833.

For what its worth I will only use rfc2833 from now on.
I dont know if it is a bug or not but I dont want my PSTN callers to hear
my DTMF tones when I activate features and this is what happened when I got
SIP INFO to work.
DTMF played to the other caller during atxfer and automon using SIP INFO. 

Issue History 
Date Modified   Username       Field                    Change               
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02-11-08 15:33  aragon         Note Added: 0082046                          
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