My PBX has an old version of freepbx (2.8) and runs Asterisk 1.8.
I have a problem sending fax through my sip trunk. I have enabled the T38 passthrough from the sip options menu. I also have put these directives in my sip trunk
but nothing seems to fix my issue.
In the following link you can see what the cli shows and also a combined manager and sip packets log.
I am trying to send fax from a ZAP device through my SIP trunk.
If anyone can help would be very nice!