[asterisk-bugs] [Asterisk 0015024]: DTMF is not working correctly for cell phones.

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=15024 
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Reported By:                alexo
Assigned To:                
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Project:                    Asterisk
Issue ID:                   15024
Category:                   Channels/chan_dahdi
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.4.24 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-05-03 15:12 CDT
Last Modified:              2009-05-06 03:14 CDT
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Summary:                    DTMF is not working correctly for cell phones.
Description: 
We have an issue calling the extension number from cell phones. Sometime is
works, but mostly fails.

The problem is that DTMF tones are coming as doubles or just in wrong
order. I'll attach asterisk console output for cell phones and land one
(yes, land phones works as expected - always).

Any help is really appreciated as most of our customers are mobile.
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Relationships       ID      Summary
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related to          0014815 [patch] DTMF Appears to be broken from ...
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 (0104283) dimas (reporter) - 2009-05-06 03:14
 http://bugs.digium.com/view.php?id=15024#c104283 
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Ahh. I forgot that Asterisk actually "removed" (or "squelches" in Asterisk
terminology) detected DTMF tones from the signal - this is clearly visible
in your landline call WAV file.
Because of this, the WAV file Monitor writes can be just wrong (because if
Asterisk has positive hit one moment during a signal, it will remove
("zero") corresponding part of the signal and this way can produce "gaps"
itself.

So, ztmonitor is probably the better choice. It should be something like
ztmonitor 1 -t /tmp/zap-tx.raw -r /tmp/zap-rx.raw

However this tool does not neem to work on my machine... 

Issue History 
Date Modified    Username       Field                    Change               
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2009-05-06 03:14 dimas          Note Added: 0104283                          
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