[asterisk-bugs] [Zaptel 0011855]: REGRESSION: DTMF generation problem

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=11855 
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Reported By:                meneault
Assigned To:                sruffell
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Project:                    Zaptel
Issue ID:                   11855
Category:                   zaptel (the module)
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     acknowledged
Zaptel Version:              SVN 
SVN Branch (only for SVN checkouts, not tarball releases):  1.4  
SVN Revision (number only!): 3490 
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             01-28-2008 01:06 CST
Last Modified:              01-30-2008 01:55 CST
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Summary:                    REGRESSION: DTMF generation problem
Description: 
Zaptel don't send DTMF tones correctly on FXO lines. For instance when
trying to dial out a number.
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---------------------------------------------------------------------- 
 meneault - 01-30-08 01:55  
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>I didn't notice any issues in our lab when using an AEX800 looped back to
itself.

Then it is probably a question of DTMF tables which may not be the same as
the compile-time generated ones (i.e gendigits.c ones). However when
strictly looking at the generation code in tonezone.c and gendigits.c they
look like the same (except low_tone_level and high_tone_level which are
'int' now and tone which is an 'int' and was a 'char' but I don't think
this would provoke any issue)... The only way to be sure is to dump the
generated dtmf tones and compare with the gendigits.c ones.

Your AEX800 may have a better built-in DTMF detection than our POTS
providers or if you don't use built-in DMTF detection then maybe your
asterisk server is configured to accept relaxed dtmf? (I didn't test on
loop back on my TDM400 but maybe it works too.)

I am currently quite busy but dumping tones is the first thing I would
have done. And if it's not a problem of tables then I think it could be a
problem of _do_dtmf (adding some debug traces) would help.

Anyway thanks for handling the issue... 

Issue History 
Date Modified   Username       Field                    Change               
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01-30-08 01:55  meneault       Note Added: 0081383                          
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