Our internal A/V calls work fine with OCS 2007, but our external/internal web calls never start. we have a dedicated edge server with the A/V role. One leg is on the internet with a publically routable address and the other leg is in our DMZ. Ports are opened up according to spec. I get 'call not completed or has ended' on the initiator side and 'call was disconnected' on the answering side. Ideas? Thanks.