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一、我国数据通信业务的 发展现状 我国数据通信网由全国公用数据通信网和专用网组成,公用网是主体,专用网是补充。全国公用数据通信网1.中国公用数字数据通信网(CHINADDN) 该网于1994年开通,目前骨干网已通达所有省会城市,并覆盖到2100个县以上的城市。CHINADDN利用数字通道在全国范围内提高中高速率的永久或半永久连接电路、专用电路、帧中继和压缩语音/G3传真、虚拟专用网等DDN业务。目前该网络为银行、证券、外商驻华机构及科研教育部门等提供2万多条专用电路。
First, China’s data communications business development status China’s data communications network by the national public data communications network and private network components, the public network is the main, private network is added. National Public Data Communication Network 1. China Public Digital Data Communication Network (CHINADDN) Opened in 1994, the backbone network has reached all capital cities and covered more than 2,100 counties. CHINADDN uses digital channels to enhance DDN services such as permanent or semi-permanent connection at medium and high rates, dedicated circuits, frame relay and compressed voice / G3 fax, and virtual private network. At present, the network provides more than 20,000 dedicated circuits for banks, securities, foreign agencies in China and research and education departments.