two FAX maschines are connected to FreePBX.
FAX1 one calls FAX2.
Incoming INVITE to FreePBX contains SDP Parameter among other things:
“Media Attribute (a): gpmd:97 vbd=yes”
In outgoing INVITE SDP Parameters are completely changed
and above Attribute is missing.
What has to be changed in FreePBX, that all incoming SDP Parameters are transfered to the outgoing side?