15:38:12 mc_: yes, the endpoint is sending RTP (to the correct port specified in FS SDP) but FS never auto-switches. I'm thinking maybe it's an issue around the timing of the RTP stream but I can't find any details about the specific requirements for auto-switching. I was thinking to try adding the rtp_auto_adjust_threshold=1 to the channel vars but I think I would need to make changes to ecallmgr.hrl for 15:38:14 that?