[asterisk-bugs] [Asterisk 0015586]: Failure to negotiate T.38

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=15586 
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Reported By:                globalnetinc
Assigned To:                kpfleming
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Project:                    Asterisk
Issue ID:                   15586
Category:                   Channels/chan_sip/T.38
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
Asterisk Version:           SVN 
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:             2009-07-26 15:57 CDT
Last Modified:              2009-08-21 17:06 CDT
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Summary:                    Failure to negotiate T.38
Description: 
To implement T.38 on most ATAs their is a reinvite required.  In the
process of gatewaying the T.38 negotiations the Asterisk server is not
doing this correctly.  On versions past 1.6.0.10 it does not even send the
same ports on the RTP streams to both parties.  

Every version past 1.6.0.10 fails
1.6.0.11
1.6.1.0
1.6.1.1
1.6.2.0-rc

This also includes the new T.38 stack that is is being introduced. in the
SVN tree of 1.6.1.1 and 1.6.2.0
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 (0109491) kpfleming (administrator) - 2009-08-21 17:06
 https://issues.asterisk.org/view.php?id=15586#c109491 
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I'm not sure what you mean by 'there is never a negotiation with the fax
device', but I can see that there is a problem here. The Sipura device
initiated the switch to T.38, Asterisk initiates a switch with your
carrier, the carrier accepts, Asterisk accepts the switch with the Sipura
device, then for some reason immediately switches back to audio mode. I'll
continue investigating. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-08-21 17:06 kpfleming      Note Added: 0109491                          
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