[asterisk-bugs] [DAHDI-linux 0015724]: When running Dahdi-Linux 2.2.0.2 with VPMADT032 console is full of PRI got event: HDLC Abort (6) on Primary D-CHANNEL

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=15724 
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Reported By:                isaacgal
Assigned To:                sruffell
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Project:                    DAHDI-linux
Issue ID:                   15724
Category:                   dahdi (the module)
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     feedback
JIRA:                        
Reviewboard Link:            
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Date Submitted:             2009-08-15 17:03 CDT
Last Modified:              2009-11-09 02:39 CST
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Summary:                    When running Dahdi-Linux 2.2.0.2 with VPMADT032
console is full of PRI got event: HDLC Abort (6) on Primary D-CHANNEL
Description: 
going back to 2.1.0.4 and the problem is gone. 

this issue was reported by alecdavid in 0015498 and it is NOT fixed and
should not have been merged into 2.2.0.2.

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 (0113397) alecdavis (reporter) - 2009-11-09 02:39
 https://issues.asterisk.org/view.php?id=15724#c113397 
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We also have echo with the TE121B (with VPMADT032):
   dahdi Linux 2.2.0.2 (version released to fix
https://issues.asterisk.org/view.php?id=15498).
   asterisk (SVN-branch-1.6.1-r226977)
   libpri (SVN-branch-1.4-r1249)

We also have 2 other sites running TE220B (with VPMOCT064) (wct2xxp
driver) with no echo problems at all, running;
   asterisk (SVN-branch-1.6.1-r226977)
   libpri (SVN-branch-1.4-r1249)
   dahdi 2.2.0 (R6707).

What is repeatable with the site with the TE121B is that after a dahdi
stop and start (including asterisk), all calls out of the TE121 are fine,
but as soon as 1 call comes into the TE121, echo becomes apparent on every
further outbound call.

The test I have setup is to a telecom voice mail service, where it asks
you for your number.
Sequence of events:
1). ensure you have the line to yourself, after hours helps.
2). unload asterisk, dahdi, load dahdi then asterisk.
3). Call telecom voice mail (multiple times), dialing DTMF digits when
required. All will sound fine, as long as only outbound calls have been
made since restart.
4). Using Cellphone, ring into the TE121, unimportant if echo (afterhours
no-one there)
5). Call telecom voice mail (again), dialing DTMF digits when required,
Echo will be there (digits are echo'd back), for each and every subsequent
call!
6). unload asterisk, dahdi, load dahdi then asterisk.
7). Call telecom voice mail service, echo has gone.

I've repeated the above sequence the versions below, with the results as
above:
DAHDI trunk (R7533)
DAHDI Branch 2.2 (R7533)
DAHDI 2.2.0.2 (R7032)
DAHDI 2.2.0 (R6707) (with patch for compander) 

Issue History 
Date Modified    Username       Field                    Change               
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2009-11-09 02:39 alecdavis      Note Added: 0113397                          
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