[asterisk-bugs] [Asterisk 0016665]: DTMF not detected at all from Sipgate despite TCPDump showing keypresses

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=16665 
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Reported By:                d_richards
Assigned To:                
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Project:                    Asterisk
Issue ID:                   16665
Category:                   Core/RTP
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           1.6.2.1 
JIRA:                       SWP-775 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2010-01-21 03:29 CST
Last Modified:              2010-03-24 13:54 CDT
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Summary:                    DTMF not detected at all from Sipgate despite
TCPDump showing keypresses
Description: 
V: 1.6.2.1

Issue is with incoming calls from ITSP 'Sipgate'. DTMF keypresses are not
detected when they enter Sipgate from the PSTN network, despite being
clearly visible with a TCPDump. There are some very slight differences in
the events:
(this may help to visualise:
http://www.fotobytes.co.uk/user22171/dtmf_debug.php )

WORKING DETECTION:
1... .... = Marker: True
Payload type: telephone-event (101)
..00 0000 = Volume: 0
Event Duration: 480

FAILED DETECTION:
0... .... = Marker: False
Payload type: Unknown (101)
..00 1010 = Volume: 10
Event Duration: 1280

Initially considered this to be config/Sipgate but after several weeks of
tweaking, changes, reading up and consultation with Sipgate this looks like
Asterisk could be to blame. Have tried with Linksys ATA and it detects the
DTMF coming in from Sipgate flawlessly, which tends to support the issue is
at least partially with Asterisk.
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 (0119848) twilson (administrator) - 2010-03-24 13:54
 https://issues.asterisk.org/view.php?id=16665#c119848 
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There was a change in dtmf handling that broke things for some users a
while back that made it into all branches. It was fixed on March 12 in SVN.
If you were having trouble with 1.4.30, but not 1.4.26, then could I get
you to try checking out from the 1.4 SVN branch and testing that to see if
it fixes your issue? Another way to similarly test would be to use 1.4.30,
but add "constantssrc=yes" in sip.conf. 

Issue History 
Date Modified    Username       Field                    Change               
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2010-03-24 13:54 twilson        Note Added: 0119848                          
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