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目前 ,上海已开始建设全光城域通信网。这是全光通信在我国第一次尝试 ,是光纤通信发展的方向。其交换采用波长路由光交换技术 ,传输采用波分复用技术 ,信息传递的速度是光同步数字传输速度的８０倍。建设全光通信网不仅可以节省网络运行和建设费用 ,而且所开放的宽带业务 ,如
At present, Shanghai has started building an all-optical metropolitan area communications network. This is the first attempt of all optical communications in our country and is the direction of the development of optical fiber communications. The exchange uses wavelength routing optical switching technology, transmission using wavelength division multiplexing technology, the speed of information transmission is 80 times the optical synchronization digital transmission speed. The construction of all-optical communications network can not only save network operation and construction costs, and the open broadband services, such as