[asterisk-bugs] [Asterisk 0013545]: Channel re-invited on destination ringing not re-invited back if ringing abandoned.

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13545 
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Reported By:                davidw
Assigned To:                putnopvut
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Project:                    Asterisk
Issue ID:                   13545
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           1.4.21.2 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             2008-09-23 08:25 CDT
Last Modified:              2008-10-21 06:50 CDT
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Summary:                    Channel re-invited on destination ringing not
re-invited back if ringing abandoned.
Description: 
An incoming SIP call is answered by an agent and then AMI transferred to a
PSTN line on Cisco CCM.  The Cisco provides SDP on the Ringing response and
Asterisk re-invites the incoming call immediately it gets that response.

The Dial command times out and cancels the outgoing call, but at no time
does the re-invite get undone, even when the dialplan eventually
successfully returns the call to the agent.  The result is a silent call.

The un-re-invite can be forced by parking the call and then unparking it
(in this case with an AMI Originate which queues it back to an agent).

This is a big problem for us as it is important for our application that
as many calls as possible have their speech path removed from the Asterisk
system.

I am also concerned that specifying multiple destinations in the Dial
command, may not inhibit the re-invite, leading to conflicting re-invites,
in the order of the Ringing events.  However, I haven't confirmed that this
is the case.
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 (0094028) davidw (reporter) - 2008-10-21 06:50
 http://bugs.digium.com/view.php?id=13545#c94028 
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I tried disabling the early bridge on ringing, progress and proceeding,
and, at least for the ringing, and subject to soaking, it seems to have
removed the symptom without compromising external bridging on answer.

However, this is removing functionality, rather than really fixing it.

I suspect that things would still break if one allowed the dialplan to
continue after answer and hangup. 

Issue History 
Date Modified    Username       Field                    Change               
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2008-10-21 06:50 davidw         Note Added: 0094028                          
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