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随着现代信息技术的发展,有线电视网已不仅仅局限于电视信号传输,而开始广泛涉足各种宽带交互式综合业务。到1997年底,全国有线电视光缆传输线路1.7万公里,电缆干线34万公里,入网用户以每年1000万户的速度快速增长。有线电视网不仅覆盖面大,普及率高,而且是高效廉价的宽带综合用户分配网络,绝大多数入户电缆是550MHz以上的系统,符合综合信息高速公路所要求的带宽,可以支持多种业务。 目前沪深两市涉及有线电视网络运营的上市公司共有中信国安、电广实业、信联股份、东方明珠、青岛东方、聚友网络、广电股份、湖南投资、中大股份、特变电工、赣能股份、欧亚集团等10家。
With the development of modern information technology, the cable television network has not only limited to the transmission of television signals, but has started to extensively engage in various broadband interactive integrated services. By the end of 1997, there had been 17,000 km of national cable television optical cable transmission lines and 340,000 km of cable trunks, with the number of network users rapidly growing at the rate of 10 million annually. Cable television network not only covers a large area, high penetration rate, but also efficient and cheap broadband integrated user distribution network, the vast majority of in-home cable is more than 550MHz system, in line with comprehensive information highway required bandwidth, can support a variety of business. At present, the listed companies involved in the operation of cable television networks in Shanghai and Shenzhen are CITIC Guoan, Dian Guangu Industrial, Xinlian, Orient Pearl, Qingdao Oriental, Juyou Networks, SVA, Hunan Investment, Zhongda Group, TBEA, Ganneng Shares, Eurasia Group 10.