i have a small issue,
when i try to make my SPA run with my 3CX PBX for inbound faxing i always have this issue after the reinvite to t38:
SIP/2.0 488 Not Acceptable Here
21.4.26 488 Not Acceptable Here
The response has the same meaning as 606 (Not Acceptable), but only applies to the specific resource
addressed by the Request-URI and the request may succeed elsewhere.
A message body containing a description of media capabilities MAY be present in the response, which is
formatted according to the Accept header field in the INVITE (or application/sdp if not present), the same
as a message body in a 200 (OK) response to an OPTIONS request.
What could it be?
I have read the Asterisk DOC for setup and fax and followed it acordingly.
The same fax server behind the SPA works fine with Patton, BeroNet, GrantStream but i have never seen this answer before.
What can i change. I have attached a Pcap.
Thx for any idea...