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一、接入网技术的发展趋势 接入网技术一直被人们视为信息高速公路的最后一公里。接入网的宽带化已成为电信网中必须尽快妥善解决的“瓶颈”，已成了未来国家信息基础设施（ＮＩＩ）的发展重点。其市场之大，前所未有，吸引了制造商、运营公司和业务提供者的注意。同时其对管制
First, the development trend of access network technology Access network technology has been regarded as the last kilometer of information superhighway. Broadband access network has become the telecommunications network must be properly resolved as soon as possible “bottleneck” has become the future development of national information infrastructure (NII) focus. Its market is unprecedented and has drawn the attention of manufacturers, operating companies and service providers. At the same time its control