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公用数字数据网江尤数字数据网（ＤＤＮ）是利用芯片光纤（数字微波和卫星）数字传输通道和数字交叉复用节点组成的数字数据传输网，可以为用户提供各种速率的高质量数字专用电路和其他新业务，以满足用户多媒体通信和组建中高速计算机通信网的需要。ＤＤＮ业务区别于传统...
Public digital data network Jiang You Digital Data Network (DDN) is a digital data transmission network that uses chip optical fiber (digital microwave and satellite) digital transmission channels and digital cross-multiplexing nodes to provide users with high-speed digital-only Circuits and other new services to meet the needs of multimedia communications users and set up high-speed computer communications network. DDN business different from the traditional ...