[asterisk-bugs] [Asterisk 0018084]: DTMF tones fail DAHDI>DAHDI

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=18084 
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Reported By:                seandarcy
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18084
Category:                   Channels/chan_dahdi
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.6.2.14-rc1 
JIRA:                        
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:             2010-10-01 12:54 CDT
Last Modified:              2010-10-03 13:25 CDT
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Summary:                    DTMF tones fail DAHDI>DAHDI
Description: 
I have internal DAHDI lines and an external DAHDI PSTN for local calls and
use SIP for ld calls. If I call locally (DAHDI > DAHDI) the dtmf tones are
messed up. They seem to be doubled, that is a "1" becomes "11". 

But on ld calls (DAHDI > SIP) dtmf works! And I tried calling a local
number that didn't work over PSTN.



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 (0127617) sruffell (administrator) - 2010-10-03 13:25
 https://issues.asterisk.org/view.php?id=18084#c127617 
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Audio inbound looks correct, when I line up the beginning of the first DTMF
digit, I see it matches up perfectly (exact bit copy) and then in the
middle of the digit are two 40ms periods of silence.    I'm wondering if
what you're seeing is related to https://issues.asterisk.org/view.php?id=17066
(not necessarily the adaptive part,
but the jitter buffer in general).

Could you try disabling the jitter buffer and see if that changes the
behavior?  If that has no impact, could you modify your dialplan such that
the two dahdi channels can be bridged in the kernel (if they aren't
already, which I don't think they are).  These wouldn't be a *fix* but
would just help ascertain where the problem lies. 

Issue History 
Date Modified    Username       Field                    Change               
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2010-10-03 13:25 sruffell       Note Added: 0127617                          
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