I have 3 VOIP providers set up. VOIPVOIP Vonage Soft Phone FreePBX The trunks from VOIPVOIP and Vonage work perfectly, the FreePBX trunk has no inbound audio. Seems strange that the other providers work and this one does not. The macnine is on a DMZ ip address. Router is forwarding: 3748 tcp/udp 5000-5500 tcp/udp 9000-20000 udp 21:10:14.937 [MS105000] C:4.1: No RTP packets were received:remoteAddr=126.96.36.199:27574,extAddr=0.0.0.0:0,localAddr=172.16.0.120:7010 Firewall Checker reports no warnings or errors. When I set the FreePBX trunk up on my astrisk server with outside IP address all works fine. Any thoughts?