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需求概述: 杭州地区的公安专网在改造前(1996年底),是星型结构的模拟网,采用模拟线路传输,基本上只能传输话音及收发传真。一旦开电话会议,专网就无法通话。市区内的模拟线路因通讯线路远等原因会造成部分地方话音质量差,有时因环境影响等多种因素而不能进行正常通讯。 虽然杭州市公安局计算机应用系统开发已有十多年,但现有公安专网不能有效地进行计算机联网,故不能充分利用综合数据库信息,严重影响公安业务的正常发
Demand Summary: Public Security Network in Hangzhou Before the transformation (the end of 1996), is a star structure of the analog network, using analog line transmission, basically only voice and send and receive faxes. Once the conference call, private network will not be able to talk. Analog lines in the urban area may cause poor voice quality in some places due to the far distance between communication lines and other reasons, and may not be able to communicate normally due to various factors such as environmental impact. Although the Public Security Bureau of Hangzhou City has been developing computer application systems for more than ten years, the existing public security networks can not effectively carry out computer networking. Therefore, they can not make full use of comprehensive database information and seriously affect the normal development of public security operations