The Design And Implementation Of An Extension Business Based On Softswitch Network

Softswitch Network, as the development of NGN (Next Generation Network), which is fully of advantags, does not only achieve the goal of connection between telecommunication network and IP network, but what is more important is the integration of business.Through analysis and research of the Softswitch platform which stages 800 business and its communication protocol and researching the QoS problem of the Softswitch transmission network, The project designed and implemented the WEB800 business based on Softswitch Network with the traditional calling procedure of 800 business. The whole WEB800 network system is divided by its function into User Terminal, Proxy Server System and Call Center. User Terminal comprising SIP User Agent play a key role in this project with its function as initiating calling and building connection, its code based on oSIP and other protocol stacks. Proxy Server system adopts TEKELEC T6000 Softswitch System as its network entity which includes Registrar Servers, Proxy Servers and Redirected Servers to be used in authentication and routing transmission, serving as the crucial control unit of the system. Call Center is used to allocate agent for the call request followed by the specified rules, Informal Call Center provided by the TEKELEC T6000 Softswitch system serves as the function module. In addition, the WEB800 Background Management System is working to achieve the tasks of the setting of black and white list and modifying the customer information, etc. In this thesis, in order to guarantee the QoS of the WEB800 business, DiffServ is applied to the core network since its characteristics of flexibility and low cost.At last, the function testing and qualification testing were carried out for the WEB800 business. The testing results fully manifested accuracy of the system and performed fairly well.