actually I have no idea, but I'm pretty sure that it's dedicated lines, within' the intranet. We use Dameware, and the computer name, anything that's not listed in active directory will not work. Other than working with it, I haven't asked what type of connections or anything of that like it is. I'm not the network administrator there, I do everything else lol. They about to change out the webserver, file server, and email server for 1 faster newer IBM model that will eventually replace all the servers. It's powerful, will be using virtual servers within' it. There's also a HP system that's replacing the Unix & SQL servers.
There's only 2 locations the main corp office for the whole deal for this side of the world is here, and auburn hills.