I am trying to determine if I have done something wrong or if something with T.38 has changed fundamentally.
I used pcapsipdump to record traces throughout the day and afterwards to delete them, to start over again the next day. I use these traces to determine why a fax call may have failed, and I used to be able to see the MCF, EOP, etc T.30 fax signals in the pcap in Wireshark.
Now, those messages are no longer present. Faxes still go through… seemingly with t.38… but I do not see messages any more that state those signal messages. How or where is this turned back on? Do I do so with a config entry in FreePBX under SIP, or do I need to change a paremeter in FreePBX for Asterisk to do so?
It’s as if there was an update to T.38 where this no longer occurs.
See the below link with info describing those messages under the “After some research, I got this…” part and how they would look previously: