The invention discloses a call center system. It concludes central platform subsystem and one or multi-client-terminal subsystem which carries out data transmission on the virtual special network built up on internet. The central platform contains a computer telephone integrated module, an IP exchanging module and primary virtual network module. And client's subsystem has a client data-base, VOIP telephone module and second virtual special-use network module, and VOIP telephone module and the computer telephone integrated module transfer data through IP exchange module. |