ABSTRACT
The paper mainly introduces the Video Conferencing System’s (VCS) definition, classification, composition and principle of design. Up to 1995, the county- level Distance Consulting System (DCS) for flood prevention has been basically completed and has achieved system connections with province (Zhejiang Province) and cities. And this essay aims at DCS from county to village expatiated with an example of Daishan County of Zhoushan Province, including the structural design, network design ,equipment selection of the system and the construction of assembly rooms.
The VCS is an application system, used to support long-distance communication of real-time information among people and develop coordinate work. The virtual conference which depends on network communication technologies make dispersed consumers gather together, exchange and share information through various ways, such as images and sound. The development of the application system has built its contribution to cause great convenience on making the communications between customers more veritable and visual. Meanwhile, applications on distance learning and long-range medical treatment also have pivotal functions. At present, the market scale of VCS is expanding day by day along with the unceasing growth of user groups.
With the development of network service technologies and multimedia technologies as well as the mature standard of international agreement, the VCS has been transformed from the higher-priced special market to market for common family use; from hardware video conference system to software system; from the system based on N-ISDN or PSTN to the IP video conference system which is on the base of grouping switched network. Compared with the traditional conference pattern, the IP video conference system has advantages of inexpensive cost and high qualified service. Therefore, this system turns into a main developing tendency and one of focal researching and developing issues currently.