Greetings- 

Working with the T.38 gateway functionality that is sparsely documented [1] , 
I'm attempting to get the following functional: 

Asterisk calling system -> Asterisk system in T.38 Gateway Mode (box in 
question) -> SIP Provider 

The problem is: 

-The provider is not initiating a reinvite to T.38, even though it is 100% 
supported 
-Asterisk is not detecting the CNG tones from the far side of the call and 
initiating a T.38 session on that call leg (with the SIP provider), but *DOES* 
attempt to initiate a T.38 session with the calling Asterisk system (which 
rejects with SIP/488 as expected) 

So, how does one force a reinvite to T.38 on the outbound call leg in this 
scenario? I did find the same problem from another user on the list in the 
archives, but didn't find a solution contained within the responses [2] . 

Thank you, 

--Tim 

[1] https://wiki.asterisk.org/wiki/display/AST/T.38+Fax+Gateway 
[2] http://lists.digium.com/pipermail/asterisk-users/2012-July/273535.html 
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