I have a Linksys router with DMZ to the Epygi, so all ports are open. Here's a sample of what it looks like.

Internet -> Linksys (DSL, DMZ option) -> Quadro -> LAN

When I check the stats on the Quadro, and it says that I have failed ports in the RTP ranges. But, often they do come back up. The biggest problem is that the call drops when the RTP port fails.

Has anyone run into this problem?