I may have changed a couple things... Things died - and I started trying all kinds of different router settings... I can dial INTO my PBX from the outside world via VOIP... I see the call come into the phone system... but as soon as anything answers the call fails... The caller gets an interrupt and I can't tell if it's the VOIP provider or the PBX... [MS105000] C:102.1: No RTP packets were received:remoteAddr=220.127.116.11:19186,extAddr=18.104.22.168:9014,localAddr=22.214.171.124:9014 [CM503008]: Call(102): Call is terminated [CM503012]: Inbound office hours' rule for LN:10000 forwards to DN:150 So here you can see the call come in on extension (VOIP) line 10000, and rings extension (150) -- which is does ring the phone. No RTP packets... I'm guessing that's the issue... So are there specific port forwarding I should look at??? Also - MS Live Mesh got installed on the PBX box (for remote admin)... I didn't notice an exact time/relationship to the failures - but maybe Mesh is grabbing traffic??? Any thoughts?