[asterisk-bugs] [Asterisk 0014434]: Dahdi does not wait for wink on outbound calls before dialing DTMF with Signalling type = em_w

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=14434 
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Reported By:                araasch
Assigned To:                
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Project:                    Asterisk
Issue ID:                   14434
Category:                   Channels/chan_dahdi
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.6.0.5 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-02-08 15:18 CST
Last Modified:              2009-02-10 13:08 CST
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Summary:                    Dahdi does not wait for wink on outbound calls
before dialing DTMF with Signalling type = em_w
Description: 
No provision for proper handling of the E&M wink start protocol exists in
chan_dahdi.c for outbound dialing from Asterisk.  The switch statement in
chan_dahdi.c lines 1950 and 1951 treat signalling types SIG_EMWINK and
SIG_EM exactly the same.

Asterisk should first take the channel offhook, wait for a wink from the
far end, then dial.

As it is, it takes the channel offhook, and immediately dials.

This is correct for E&M Immediate Start, but not for E&M Wink Start.

This was first reported 2005-03-15 with tracker id of 3772 which described
the problem in chan_zap.c

It appears no further action was taken.

This behavior has been verified with T1 test equipment.

I checked the code on the online Doxygen system to determine if any
further updates had addressed this issue, and it appears that none has.

Thanks.
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 (0099827) jsmith (manager) - 2009-02-10 13:08
 http://bugs.digium.com/view.php?id=14434#c99827 
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I've verified this in my lab (using both Asterisk 1.4 and Asterisk 1.6.0),
and Asterisk is indeed dialing the digits without waiting for the wink to
occur.

If you turn up the debugging in logger.conf, you can indeed see that
Asterisk dials the digits, and then later sees the wink (and says "Hey, I'm
gonna ignore this").  I've attached the debug log to this bug to show this. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-02-10 13:08 jsmith         Note Added: 0099827                          
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