[asterisk-bugs] [Asterisk 0015610]: Very not stable by sending a T.38 Fax by with app_fax/spandsp

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=15610 
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Reported By:                huangtx2009
Assigned To:                
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Project:                    Asterisk
Issue ID:                   15610
Category:                   Applications/app_fax
Reproducibility:            sometimes
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.6.1-beta4 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): 1.6.1 
SVN Revision (number only!): 209327 
Request Review:              
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Date Submitted:             2009-07-29 16:16 CDT
Last Modified:              2009-08-04 10:09 CDT
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Summary:                    Very not stable by sending a T.38 Fax by with
app_fax/spandsp
Description: 
I used the latest asterisk1.6.1 and spandsp0.0.6pre12. I tried to send Fax
to a Fax service provider supporting SIP T.38 (They claim their Fax service
can work with many devices well).

It is seldom successful.

But it often fails. Moreover, the error is different.
Sometimes, the error is "Unexpected message received".
Sometimes, the asterisk sender responds with 488 Not acceptable here to
the Re-INVITE for T.38.
Sometimes, the error is "the HDLC carrier did not stop in a timely
manner".

I wonder it is buggy or I do not configure something correctly. Thanks a
lot.


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 (0108597) kpfleming (administrator) - 2009-08-04 10:09
 https://issues.asterisk.org/view.php?id=15610#c108597 
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Nearly all messages that appear from app_fax itself are FAX protocol
related, and thus are outside the influence of Asterisk; they would
indicate some sort of protocol incompatibility between the spandsp T.38
implementation and your provider's implementation.

Your second uploaded log does demonstrate an actual issue that needs to be
addressed; I'll edit this issue report to have a proper summary for it. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-08-04 10:09 kpfleming      Note Added: 0108597                          
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