I'm a Telrad guy and SSphones is too. Are you TVSE to TVSE to the two systems or t-1 card to t-1 card. What version on the IPex or MPD2 or MPD400 and the TVSE. To fine this info on the TVSE card, you need to web broses into the TVSE card. On the MPD2 or IPEX card you need the programing software. On the MPD400 you can look at the card. You say you upgrade about a year ago. There have been software upgrades since then the latest on the TVSE (witch is the Voip sever)is 3.43. But you need to have an mpd2 or ipex. If you have an MPD400 I think the latest is 2.07.
Internet connection: T1 point to point Chattanooga to Nahsville and T1 point to point Chattanooga to Denver. Is this connected by t-1 cards or TVSE cards.