Greetings, Deano from NZ. For a commercial solution, on a very professional level, look no further. I am a technical consultant with 10+ years exp in telecommunications. Don't go to Cisco or Lucent, I will provide you the same professionalism at a fraction of the cost. I will provide you a state of the art routing, billing, accounts, accountledger and service application system. This is my full time profession. My primary business supplies calling card platforms to 4 providers here in NZ. As a second job I work on opensource solutions. No time wasters though, and no business plans with no budget but expect everything. My consulting is valuable enough on its own, let alone development. Thank you for your time. Once a implementation plan is done we can work out ongoing project costs as I am sure your needs go further than just having the executable running on your server.