Every few calls or so I experience no audio on the incoming side. This error is generated: Code: [MS003005] C:40.2: Failed to create Endpoint: (destination=192.168.1.100) EndPoint: ID=00000050@(LOCAL) LOGID=C:40.2 Status: MSEP_FAILED RTP:192.168.1.104:7084 RTCP:192.168.1.104:7085 STUN RTP:0.0.0.0:0 STUN RTCP:0.0.0.0:0 Coder: NOT SET 101:telephony-event Party ptime:20 Party RTP:0.0.0.0:0 Party RTCP:0.0.0.0:0 Decoders: [empty] I'm guessing that there is a codec issue? I'm using a PAP2 and have limited 3CX and the PAP2 to use G711u ONLY. I've been trying to track down the source of choppy outgoing audio as well. All of the required ports have been forwarded at my router and 3CX passes the firewall test. 3CX is installed on Windows Server 2003 sbs. Do I need to configure any settings within Windows 2003? Windows firewall is disabled due to the use of RAS.