[asterisk-bugs] [Asterisk 0016255]: DAHDIScan() only returns dead air

[Asterisk Bug Tracker]

The following issue has been SUBMITTED. 
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https://issues.asterisk.org/view.php?id=16255 
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Reported By:                sh-beta
Assigned To:                
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Project:                    Asterisk
Issue ID:                   16255
Category:                   Applications/app_zapscan
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.26.3 
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:             2009-11-16 14:09 CST
Last Modified:              2009-11-16 14:09 CST
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Summary:                    DAHDIScan() only returns dead air
Description: 
I originally reported this to the asterisk-users mailing list, but given
the resounding silence figured it might better go here.

I'm running Asterisk 1.4.26.2, DAHDI 2.2.0.2, and libpri 1.4.10.2 on
Ubuntu 8.04 with a Digium TE122 connected to my PRI. Note that because this
is a production machine, I have not had a chance to update Asterisk to
1.4.26.3. Since that version has no relevant code changes, I don't expect
it would make much of a difference anyhow.

I have an extension setup so that managers can monitor calls:
----
# grep 9900 /etc/asterisk/extensions.conf
exten => 9900,1,DAHDIScan()
exten => 9900,2,Hangup
----

For whatever reason, this no longer works. It's not often used, so I don't
even know when it stopped working. But now whenever I dial 9900, I just get
dead air. The * key works to terminate the call, so I assume the # key is
cycling through channels - but even if there's a few calls going on, I get
no audio from this extension.

Calling 9900 yields this log message:
----
Executing [9900 at from-sip-internal:1] DAHDIScan("SIP/7007-08479148", "") in
new stack
----

But switching channels logs nothing. I have tested this with ZapScan as
well.
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Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-11-16 14:09 sh-beta        New Issue                                    
2009-11-16 14:09 sh-beta        Asterisk Version          => 1.4.26.3        
2009-11-16 14:09 sh-beta        Regression                => No              
2009-11-16 14:09 sh-beta        SVN Branch (only for SVN checkouts, not tarball
releases) => N/A             
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