Using CPL To Create Value-Added Services On Sipphone

With the quick development of the IP technology,IP phone can not reach the increasing personal requirement of the people,and has to face to the hot competition.The telecom oprator ,manufacture vendor and SP all pay attention to the research,development and commercial application of the new services,the topic on this field is very promising and challenge.The paper is based on VoIP embedded development platform,and discuss on the research and development of the new services. After studing the RFC3880,which is published by IETF not long ago,we aim to offer the customer different,personal,diverse value-added services,let them add,delete,modify their services on GUI interface,but not passive to accept new services,that is to say "customer accesss".As to the developer ,using CPL to create new services,they can improve the expansibility of the system,save the mem's resource,reduce the development's period,easy to to mantenance and management and communicate to others.Firstly,the paper briefly introduces the background of the topic,the finished work and the architecture of the paper,in the chapter 2,IP phone technology,SIP protocol,CPL language background are mentioned,after research and compare the difference between several technology to set up value-added services,the writer concludes: using CPL language to build value-added services. For my study is trend to research,in chapter 3,I conclude the situation of china, foreign countries and our lab research, Including supplying scripts by the terminal users;uploading the CPL scripts by REGISTER message;using CPL server;creating scripts by GUI...