[asterisk-bugs] [Asterisk 0016483]: ReceiveFAX always end with "Transmission error" but Fax transmitted successfully

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=16483 
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Reported By:                vrban
Assigned To:                
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Project:                    Asterisk
Issue ID:                   16483
Category:                   Applications/app_fax
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.6.2.0 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-12-21 04:02 CST
Last Modified:              2009-12-21 09:19 CST
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Summary:                    ReceiveFAX always end with "Transmission error" but
Fax transmitted successfully
Description: 
I successfully receive a fax via t.38 (spandsp-0.0.6pre12) but app_fax
always end with "WARNING[12627]: app_fax.c:811 transmit: Transmission
error" and then jump to the hangup extension.
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 (0115524) vrban (reporter) - 2009-12-21 09:19
 https://issues.asterisk.org/view.php?id=16483#c115524 
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the old 1.4.20 does not handle the RTP re-invite after the t.38
transmission between the T.38 gateway and the 1.6.2 asterisk with app_fax.
my settings is:

T.38 gateway (some bigger siemens box) -> asterisk 1.4.20 (t.38
pass-through) ->
asterisk 1.6.2 with app_fax. and the app_fax error only happen with older
1.4 asterisk version because of the "chan_sip.c:14271
handle_request_invite: RTP re-invite after T38 session not handled yet ! "
but since asterisk 1.4 can handle the RTP re-invite after T38 session, this
issues is solved a can be closed.

More important is the t.38 pass-through issue
https://issues.asterisk.org/view.php?id=16318 

Issue History 
Date Modified    Username       Field                    Change               
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2009-12-21 09:19 vrban          Note Added: 0115524                          
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