Okay- so the line to flag is:
"[2016-01-04 11:38:44] NOTICE[2015] chan_sip.c: Disconnecting call 'SIP/9423-000000f8' for lack of RTP activity in 31 seconds"So my next question is WHY is no RTP traffic being passed? I think if I hit that nail, then I'm ok for my other issues.