Unfortunatly, my information will be limited as I'm the computer guy and the owner got tired of the phone guy and decided that phones and computers are close enough. Here's the setup. Site A with an NBX connected to Site B via a point to point VPN in the routers. Site B has a Cisco 3120 IP Phone that has a local address for the Site B subnet but connects to the Site A NBX. It works great. Site A also connect to Site C via a point to point VPN, however site C also has an NBX. Site A and C are seperate phone systems. I'm trying to setup an IP phone at site C like site B. It seems to work. I can login to the NBX in site A, see the phone, and it says it is connected. THe phone isn't working though. It connects to the NBX, downloads the image, and then loads the image and proceeds to sit on the screen with the phones mac address. I know the phone works because I cleared the eprom, took it to site A and the NBX gave it an extension and it was working fine. Any ideas?