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@sip.domain.org"/>
 </condition>
</extension>

Is there anything obvious that I'm missing here?

Thanks
Mike