The Design And Realize Of IP Telephone System Based On Campus Network

Nowadays Internet, based on IP technology, with open business-starting environment and spreading business-making system, has formed a uniform network roof all over the world. With the fast development of computer and Wide Band technology, coupled with maturity of Optical Fiber Communication of large capacity, IP and digital technique, the amalgamative tendency among telecom, computer and CATV network has become more and more prominent. Owing to these facts, voice service on IP network with great potential has gained more and more popularity. However, as a new systematic project IP telephone technique stills wants great improvements with regard to certain aspects, for instance, Quality of Service, whose development is the main concern in this text.This text has been mainly described an IP telephone system, including the definition of IP telephone, the history, the main causes of starting such a business, the process of calling, the key technique of IP, and detailed explanation of H.323 and SIP protocol, which are widely used in multimedia communication. Based on that and campus network, an IP communication system is designed, which falls into system management module, calling process module and frequency data process module.