We've been looking around for a while at upgrading from our old PBX and moving to a VOIP system. We have several offices spread across the country, and just looking at toll free routing, and savings in long distance along with having a more feature rich phone system makes us lean towards the VOIP solution. We've been looking hard at doing Cisco, but wanted to get some more information. We're being told with an Avaya system we could bridge our old PBX systems at our branch offices into the VOIP system as a way to phase in our implementation and wanted to know if Cisco offered the same kind of system. I'm looking into it to flesh out the idea and have it as a second option if we can't get the full implementation approved, but I'm leaning towards the concept that it would be better to just upgrade everything. Someone tell me if I'm crazy and bridging an existing old style PBX into a modern VOIP system works like candy and roses.