The Design And Implementation Of Call Server In Digital Platform Of Intelligent Telephone System

With the rapid developing of Internet technology and the fast updateing of digital communication technology, people have more hope of daily data communication and information transmission. Therefore in order to respond to the rapid development of the market, taken the "Phonetic Platform of Intelligent Teleplony System" as background, we proposed the "Digital Platform of Intelligent Telephone System" according to the experimental condition in our laboratory. People who use the intelligent terminal of the system can obtain many kinds of services, such as voice services or data services.Taken the conception of Next Generation Network and Softswitch for reference, it is proposaled the designing Call Server in Digital Platform of Intelligent Telephone System. The digital call server can accomplished many fuction, eg authentication for user authorization for user, account of user, encryption of information, agenting of network, receiving the requirement of customer, upbuilding disputation, connect control, business logic control.This paper introduced the conception and the whole configuration of Digital Platform of Intelligent Telephone System. According as the demanding of fuction, it is designed and accomplished the digital call server in digital platform of intelligent telephone system. It is resolved key problem of designing: flexibility of system, expansibility of system, designing of communication protocol, grahics interface of real time, multithread programming. Under Windows 2000 operating system, using Visual C++ developing instrument of Microsoft, adopting Multithreaded programming model, and Socket programming, realized the fundamental function of digital call connection server. Digital call connection server is the key point of the whole platform, digital platform of intelligent telephone system can provide abundant services only under the control of digital call connection server.At present, digital call server has been tested in the environment of laboratory, and it is exercising in analogue network. Certification of result, digital call server going round is reliable, performance of call server is well and necessity of normal running of system can be satisfied.