The Study And Design Of IP Phone System Based On ARM

With the development of the computer technology and the networking, the network user' s daily popularization, the information network which takes the multimedia correspondences as the main body is more and more receiving the people' s attention. The IP phone is the most representative product. The IP phone is a telephone business which transmits in the network stipulated by IP protocol, it is one kind of brand-new communication of using Internet as the pronunciation transmission medium, and realizing the pronunciation correspondence. It is a new digitized transmission technology which establishes in the Internet foundation, it is one kind of telephone application which realizes based on the TCP/IP protocol in the IP net. In opposite of the traditional telephone, the biggest superiority of the IP phone is that it can use the existing Internet resources fully, and provide more and higher quality services for the user.The IP phone system includes telephone terminal and server, the telephone terminal is designed based on the present quite popular ARM embedded microprocessor, and this is the emphasis of the paper. The paper first introduces the present situation of the network telephone development, the principle of work and the key technologies, discusses the correlation theories knowledge of the pronunciation compression algorithm, elaborates the H.323 protocol and the TCP/IP protocol, then briefly introduces the ARM embedded system, and proposes a kind of the IP phone detailed design proposal based on the ARM in this foundation, and elaborates a telephone terminal concrete realization method and the realization process based on the S3C4510B microprocessor and the VxWorks operating system, then makes the detailed elaboration of the software design of the server, finally summarizes the full text, and carries on the forecast to the IP telephone prospects for development.