I’m trying to upgrade from Asterisk 13.2 to Asterisk 16.15 (Debian Stretch to Debian Bullseye).
I have a trunk provider that I connect with pjsip. They require: “Send SDP using the Early Offer method in initial SIP Invite.”
Outbound calls fail on 16.15 but work on 13.2. Using sngrep, the difference seems to be that 13.2 would send SDP with an early invite, but that does not seem to happen on 16.15.
That is, the 13.2 sequence is
100 Trying <-
401 Unauthorized <-
INVITE (SDP) ->
The 16.15 sequence is similar, except that the second INVITE does not include the SDP.
Any advice or insight is appreciated.