T.38 Termination, re-INVITE fails with 488

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T.38 Termination, re-INVITE fails with 488

Postby pzwahlen » Mon Sep 14, 2009 4:10 am

Hi,

I have a problem with T.38 fax termination. I am running AsteriskNOW with 1.6.0.15. I have the following setup

FAX --> PSTN --> ISDN/BRI --> Patton SN4554 --> SIP/T.38 --> Asterisk

The Patton GW does fax autodetection, and is configured for T.38 fax relay. The problem is that the call starts with G711, and after a few seconds fax detection triggers a re-INVITE with T.38. Asterisk reply with "488 Not available here" and the call terminates (successfully) with G711. It means fax termination works, but only with G711, not T.38.

I have "t38pt_udptl=yes" in both sip->[general] and in my Patton trunk. I have tried different combinations of "t38pt_rtp / t38pt_tcp = yes / no"

I have a full console debug as well as PCAP available.

Thanks for any help. Regards. - Patrick -
pzwahlen
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Re: T.38 Termination, re-INVITE fails with 488

Postby mdiehl » Mon Feb 14, 2011 3:23 pm

Did you ever get this fixed? If so, what did you have to do? I've got the same problem.
mdiehl
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Re: T.38 Termination, re-INVITE fails with 488

Postby pzwahlen » Tue Feb 15, 2011 3:01 am

Nope, but we haven't tried with the latest versions of Asterisk.

Regards
pzwahlen
Newsterisk
 
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Joined: Mon Nov 27, 2006 3:05 am

Re: T.38 Termination, re-INVITE fails with 488

Postby Md. Kayesh » Thu Apr 19, 2012 7:45 pm

I am facing the same problem. I am using windows version of asterisk and it is old. Trying to install new asterisk in ubuntu, but could not install it yet there.
Md. Kayesh
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