[asterisk-bugs] [Asterisk 0018021]: T.38 Fax Fallback to Pass-Through didn't work

[Asterisk Bug Tracker]

The following issue has been UPDATED. 
====================================================================== 
https://issues.asterisk.org/view.php?id=18021 
====================================================================== 
Reported By:                sybasesql
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   18021
Category:                   Channels/chan_sip/T.38
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           1.6.2.13 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
====================================================================== 
Date Submitted:             2010-09-21 07:22 CDT
Last Modified:              2010-09-21 14:08 CDT
====================================================================== 
Summary:                    T.38 Fax Fallback to Pass-Through didn't work
Description: 
Dear All!

OS: CentOS 5.5 x86_64
Asterisk: 1.6.2.13 x86_64

[ISP]--SIP--[ASTERISK]
ISP: T.38 fallback g711alaw
ASTERISK: t38pt_udptl=no

I have problem with T.38 reinvite: When we received reinvite from ISP, we
answered 488 Not accptable here and ASTERISK begin send UDPTL instead of
G711 RTP.

I attached call trace to view in wireshark.

====================================================================== 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2010-09-21 14:08 lmadsen        Description Updated                          
======================================================================