[asterisk-bugs] [Asterisk 0016692]: [patch] Missing fallback to audio fax feature when T.38 re-INVITE failed for 1.4

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=16692 
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Reported By:                vrban
Assigned To:                
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Project:                    Asterisk
Issue ID:                   16692
Category:                   Channels/chan_sip/T.38
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     ready for testing
Asterisk Version:           1.4.29 
JIRA:                       SWP-795 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases):  1.4  
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2010-01-25 07:21 CST
Last Modified:              2010-02-11 06:14 CST
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Summary:                    [patch] Missing fallback to audio fax feature when
T.38 re-INVITE failed for 1.4
Description: 
When a  T.38 re-INVITE failed with an 488 or 606 answer, we should fallback
to audio fax by send a re-re-INVITE without T.38. The function is
backported from 1.6 asterisk. Some people say this is a feature, other say
that it is a bug that 1.4 does not fallback to audio. Here is the patch.
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 (0117986) vrban (reporter) - 2010-02-11 06:14
 https://issues.asterisk.org/view.php?id=16692#c117986 
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hello, the new (high grade experimental) patch is working in my lab, and
1.4 chan_sip procures a fallback to audio fax between a T.38 re-INVITE
B-side (a asterisk-1.6 with app_fax) and the A-side that dont talk T.38 

Issue History 
Date Modified    Username       Field                    Change               
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2010-02-11 06:14 vrban          Note Added: 0117986                          
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