Could anyone tell me if it is possible to intergrate my androiphone into my office VoiP PBX? We recently put our whole telephone exchange onto VoiP, and there are quite a few apps, such as FriendFinder, which allow you to make free calls to other users with the app. What I want to know is can I get may android to be part of my office VoiP exchange? At the moment I can call my colleagues (as they all have androids) from my PC using FriendFinder but can't get them into the office system. Anyone have any ideas?