[asterisk-bugs] [Asterisk 0019128]: Asterisk 1.8.x Skips DTMF Digits on a First DAHDI Initiated Call

[Asterisk Bug Tracker]

The following issue has been UPDATED. 
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https://issues.asterisk.org/view.php?id=19128 
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Reported By:                vmikhelson
Assigned To:                
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Project:                    Asterisk
Issue ID:                   19128
Category:                   Channels/chan_dahdi
Reproducibility:            sometimes
Severity:                   major
Priority:                   normal
Status:                     closed
Asterisk Version:           1.8.3.2 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
Resolution:                 won't fix
Fixed in Version:           
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Date Submitted:             2011-04-15 20:59 CDT
Last Modified:              2011-04-19 07:25 CDT
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Summary:                    Asterisk 1.8.x Skips DTMF Digits on a First DAHDI
Initiated Call
Description: 
I know it sounds weird, and this is part of the reason I have not reported
that sooner.

As I upgraded from 1.6.2.x to 1.8.x several months ago I am experiencing
this problem.   If a call is initiated from a DAHDI extension after no
DAHDI extensions were used for some time, arbitrary DTMF digits are skipped
and the call fails.  If the call is redialed it goes through.  Normally
just one (1) redial attempt is sufficient.  Replicated from different
analog phones.

Troubleshooting and observations:
1. Provided external power to the TDM400P with FXS daughter cards.  It did
not help.
2. Using RXGAIN / TXGAIN in /etc/asterisk/dahdi-channels.conf on another
TDM410 card makes situation worse (I do realize that this one sounds crazy,
but I verified this one by process of elimination).
3. Played with echo cancellation parameters with no luck.


Configuration:

Asterisk 1.8.3.3
DAHDI Version: 2.4.1.2 Echo Canceller: MG2, HPEC
FreePBX 2.9.0rc1.3

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---------------------------------------------------------------------- 
 (0133914) lmadsen (administrator) - 2011-04-19 07:25
 https://issues.asterisk.org/view.php?id=19128#c133914 
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If you can reproduce this with SIP channels or other channels other than
those going through analog hardware then feel free to reopen this issue,
otherwise it does appear to me to be a hardware issue. Please try
reproducing this with Digium hardware on the inside interfaces, and if you
can reproduce it there, then you can call Digium support, and if after they
perform diagnosis determine it is not hardware related, then the issue will
get moved over to the appropriate development team. Otherwise there isn't
much we can do here. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2011-04-19 07:25 lmadsen        Note Added: 0133914                          
2011-04-19 07:25 lmadsen        Status                   new => closed       
2011-04-19 07:25 lmadsen        Resolution               reopened => won't fix
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