[Freeswitch-users] T38 re-invite, 488 Not Acceptable Here, Freeswitch 1.6.20

[Michael Avers]

Hello,

I understand the T38 behavior changed after 1.6.13. I watched Brian's
video from last year, read the docs, but I just don't see what else I
would need for a very simple scenario for receiving a fax with the
receiving end (ATA) re-inviting T38.
PSTN > FS > HT801 ATA > T38 RE-INVITE > FS > PSTN

The ATA does re-invite, however FS rejects immediately with 488 Not
Acceptable Here. I'm using the following dialplan. I also tried to use
export instead of set, but same result.
<extension name="faxdid1" continue="false">
 <condition field="destination_number" expression="^(4154447777)$">
   <action application="set" data="ignore_early_media=true"/>
   <action application="set" data="fax_enable_t38_request=true"/>
   <action application="set" data="fax_enable_t38=true"/>
   <action application="bridge" data="user/6050 at sip.domain.org"/>
 </condition>
</extension>

Is there anything obvious that I'm missing here?

FreeSWITCH (Version 1.6.20 -37-987c9b9 64bit)



Thanks
Mike
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