[asterisk-bugs] [Asterisk 0018635]: No Re-Invite message from Asterisk to the peer when trying for FAX pass-through

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=18635 
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Reported By:                pkolusu
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18635
Category:                   PBX/General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           Older 1.6.2 - please test a newer version 
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:             2011-01-18 04:17 CST
Last Modified:              2011-01-19 10:08 CST
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Summary:                    No Re-Invite message from Asterisk to the peer when
trying for FAX pass-through
Description: 
I have been trying to test fax pass-through with Asterisk.
The scenario is like this. 
Two fax machines are connected to the ports that are configured with
Asterisk server.

When i am trying to send fax from one port to another port, the receiving
port is detecting the fax tone, after initial call set up, and sending the
re-invite to change the codec to G711(PCMA), it is receving the response
from the Asterisk (Trying and 200 OK), but there is no re-invite message
from the Asterisk server to the peer(in this case fax initiator). 

i am expecting the re-invite message from the Asterisk to the peer to
change the codec to G711(PCMA), but it is not happening. what is the
problem i did not understand. 

I have tried with canreinvite=yes and no and nat=yes and nerver. but the
behaviour is same. no re-invite message from the Asterisk to the peer.


Could you please help me to resolve this issue.
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 (0130691) mnicholson (administrator) - 2011-01-19 10:08
 https://issues.asterisk.org/view.php?id=18635#c130691 
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This is not the way fax passthrough works in asterisk.  If you would like
to do passthrough in this manner, set up the channel for ulaw or alaw from
the start, or use T.38 passthrough.  T.38 passthrough is the only fax
passthrough configuration that we officially support. 

Issue History 
Date Modified    Username       Field                    Change               
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2011-01-19 10:08 mnicholson     Note Added: 0130691                          
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