[asterisk-bugs] [Asterisk 0015420]: 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. 
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https://issues.asterisk.org/view.php?id=15420 
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Reported By:                scottbmilne
Assigned To:                
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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:              
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Date Submitted:             2009-06-29 13:58 CDT
Last Modified:              2009-06-29 18:57 CDT
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Summary:                    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.

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 (0107203) scottbmilne (reporter) - 2009-06-29 18:57
 https://issues.asterisk.org/view.php?id=15420#c107203 
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Just noted that dahdi_monitor shows that audio is being received from the
nortel side even though no audio can be heard on either the nortel or
asterisk side prior to a keypress on the asterisk side. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-06-29 18:57 scottbmilne    Note Added: 0107203                          
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