Based H.320 Video Conferencing Systems And Applications

The call conference system based on voice is still used by the stations and segments of Guangzhou Railway Group Corporation in Hunan Province. For being used for many years, the system has fault of much noise, trembling sound and high ratio of malfunction so that it bring bad effect to the quality and the effect of the meeting. Moreover, since the railway reform of removing the branch bureau and the bureau administrating the stations and the segments directly, the old call conference system based on voice did not meet the need of railway management any more. In order to meet the need of the development of railway management, a Videoconference system has been employed in Guangzhou Railway Group Corporation. The new system provides a safeguard to administrate and coordinate railway transportation orderly.One of the paper's emphasizes is put on the main content of two international standards of Videoconference, they are H.320 standard presented at the beginning of 1990s and H.323 standard presented in the mid 1990s. According the current requirement of Guangzhou Railway Group Corporation and the condition of Railcom communication, the paper also compares the characteristic of these two standards and discusses the benefit of constructing network by adopting H.320 standard. The detailed system structure of Videoconference is introduced in this paper, including physical structure and logical structure, as well as terminal system structure and network structure.Later, the paper discussed the method of realization of the Videoconference in detail and the whole design of Videoconference is put forward. Finally, based on the current condition of Guangzhou Railway Group Corporation, the concrete design of Videoconference of Guangzhou Railway Group Corporation in Hunan Province is formed.The implement of the whole system has obtained much practical effect and has very important meaning to improve the accuracy, efficiency and safeguard of the railway transportation.