[asterisk-bugs] [DAHDI-linux 0013866]: TDM400P FXO when configured for alaw fails to dialout

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=13866 
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Reported By:                alecdavis
Assigned To:                sruffell
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Project:                    DAHDI-linux
Issue ID:                   13866
Category:                   Core/Channels
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     acknowledged
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Date Submitted:             2008-11-09 19:44 CST
Last Modified:              2009-06-13 03:45 CDT
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Summary:                    TDM400P FXO when configured for alaw fails to
dialout
Description: 
In /etc/dahdi/system.conf selecting alaw=35 causes the FXO to fail
dialout.

All that is heard is constant ~1000Hz square wave, this estimated.

Using mulaw=35 the line works fine.

This is not new, also happens on our production box which is Asterisk
1.6.0-rc6 with DAHDI-2.0.0-rc2
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 (0106362) alecdavis (reporter) - 2009-06-13 03:45
 https://issues.asterisk.org/view.php?id=13866#c106362 
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With a TDM800P using Asterisk SVN-branch-1.6.1-r199300 and DAHDI
SVN-trunk-r6675 on Debian Lenny in /etc/modprobe.d/dahdi had to add the
following line;

options wctdm24xxp alawoverride=1

The symptom on the TDM800P FXS port is extremely loud dialtone, and will
not recognise any dialling.

I'm kicking myself, I wasted about 2 hours trying to 're-find' this.
I'd tarred up /etc/dahdi and /etc/asterisk and moved to new box, forgot
about /etc/modprobe.d/dahdi, copying it wouldn't have helped, different
card but same problem, moved from TDM400P to TDM800P. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-06-13 03:45 alecdavis      Note Added: 0106362                          
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