[asterisk-bugs] [Asterisk 0015420]: [patch] No audio on calls from asterisk sip phones to nortel set until dtmf from sip phone

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
====================================================================== 
https://issues.asterisk.org/view.php?id=15420 
====================================================================== 
Reported By:                scottbmilne
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   15420
Category:                   General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.25.1 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
====================================================================== 
Date Submitted:             2009-06-29 13:58 CDT
Last Modified:              2009-06-30 03:53 CDT
====================================================================== 
Summary:                    [patch] No audio on calls from asterisk sip phones
to nortel set until dtmf from sip phone
Description: 
When placing a call from an Asterick SIP phone (X-Lite) to Nortel phone set
(M3903), no voice will pass until any key is pressed on the SIP phone. SIP
to SIP calls - normal. SIP to external phone - normal. Nortel to SIP -
normal. All permutations of calls pass audio immediately upon answer except
an sip to nortel.

Asterisk is behind Nortel Option 11c via PRI
Telco -> PRI -> Nortel Option 11c -> PRI -> Asterisk

Very new to Asterisk and VOIP and don't know where to start...Any
suggestions would be GREATLY appreciated.

====================================================================== 

---------------------------------------------------------------------- 
 (0107222) alecdavis (reporter) - 2009-06-30 03:53
 https://issues.asterisk.org/view.php?id=15420#c107222 
---------------------------------------------------------------------- 
uploaded bug15420-1.4.25.1-diff.txt

Assuming only ALTERTING has been received during a callsetup, and no PRI
PROCEEDING or PROGRESS indicators have been received, no audio is heard.
This patch set 'dialing=0' when PRI_EVENT_ANSWER is triggered, thus will
allow audio.

It's working our 1.6.1 system.
I checked out 1.4.25.1, applied the patch, and compiled. But have not
tested.
Code in 1.4.25.1 is nearly identical to 1.6.1, so have no reason to doubt
whether it should work. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-06-30 03:53 alecdavis      Note Added: 0107222                          
======================================================================