I have a customer with a 7200 v4.22 (waiting for spnet license to upgrade them to the latest version) They just got a new integrated access circuit 3MB for internet and local lines. We had the phone system on the new IA for a month before they move the data network to it. Every thing was working untill they put us behind the firewall (so we could network with another 7200 via point to point t1). There data guy assured me that he opened all ports to my system and mgi card.
Some of the IP phones work fine, but they have one location with 4 VoIP phones and they are having audio problems. If I call them from a digital phone then I can here them but they can't here me. If they call me then we have no audio.