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随着社会经济的发展，人们对住处的需求急剧增加，信息量呈现指数增长，通信业务也从电话、数据向视频、多媒体等宽带业务发展。近几年涌现出的ＤＳＬ、卫星传输、有线传输等高速宽带接入技术预计将会在今后５年内逐步成为主流，并迅速成长为网络中坚，而光纤技术等将与ＤＳＬ
With the socio-economic development, people’s demand for dwellings has increased dramatically, the amount of information has increased exponentially, and communication services have also expanded from telephone and data to broadband services such as video and multimedia. In recent years, emerging high-speed broadband access technologies such as DSL, satellite transmission and wireline transmission are expected to gradually become mainstream within the next five years and will rapidly grow into the backbone of the network. Optical fiber technologies, for example, will work with DSL