[asterisk-bugs] [Asterisk 0014849]: [patch] SendFax function not working as expected on > 1.6.0.7

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=14849 
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Reported By:                afosorio
Assigned To:                kpfleming
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Project:                    Asterisk
Issue ID:                   14849
Category:                   Channels/chan_sip/T.38
Reproducibility:            always
Severity:                   block
Priority:                   normal
Status:                     closed
Target Version:             1.6.0.12
Asterisk Version:           1.6.0.7 
Regression:                 Yes 
SVN Branch (only for SVN checkouts, not tarball releases): 1.6.0 
SVN Revision (number only!):  
Request Review:              
Resolution:                 fixed
Fixed in Version:           
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Date Submitted:             2009-04-07 15:51 CDT
Last Modified:              2009-07-09 16:27 CDT
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Summary:                    [patch] SendFax function not working as expected on
> 1.6.0.7
Description: 
When trying to send a fax via callfile using T.38 in asterisk version
1.6.0.5 it works fine, but after upgrading to asterisk 1.6.0.7 or newer it
does not work. When receiving re-INVITE from media gateway (Cisco AS-5400)
Asterisk ends call answering 488 Not acceptable here. I am running Asterisk
under Debian kernel 2.6.18-6-686. I am attaching captures both for scenario
which works and scenario which does not work. 
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 (0107529) svnbot (reporter) - 2009-07-09 16:27
 https://issues.asterisk.org/view.php?id=14849#c107529 
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Repository: asterisk
Revision: 205699

_U  branches/1.6.2/
U   branches/1.6.2/apps/app_fax.c
U   branches/1.6.2/channels/chan_sip.c
U   branches/1.6.2/include/asterisk/frame.h

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r205699 | kpfleming | 2009-07-09 16:27:36 -0500 (Thu, 09 Jul 2009) | 23
lines

Merged revisions 205696 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/trunk

........
  r205696 | kpfleming | 2009-07-09 16:20:23 -0500 (Thu, 09 Jul 2009) | 16
lines
  
  Repair ability of SendFAX/ReceiveFAX to respond to T.38 switchover.
  
  Recent changes in T.38 negotiation in Asterisk caused these applications
to
  not respond when the other endpoint initiated a switchover to T.38; this
  resulted in the T.38 switchover failing, and the FAX attempt to be made
  using an audio connection, instead of T.38 (which would usually cause
the
  FAX to fail completely).
  
  This patch corrects this problem, and the applications will now
correctly
  respond to the T.38 switchover request. In addition, the response will
include
  the appopriate T.38 session parameters based on what the other end
offered
  and what our end is capable of.
  
  (closes issue https://issues.asterisk.org/view.php?id=14849)
  Reported by: afosorio
........

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http://svn.digium.com/view/asterisk?view=rev&revision=205699 

Issue History 
Date Modified    Username       Field                    Change               
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2009-07-09 16:27 svnbot         Checkin                                      
2009-07-09 16:27 svnbot         Note Added: 0107529                          
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