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ＩＮＴＥＲＮＥＴ省级节点的初步设计（下）张钟（国家科委信息司新技术处）六、通信平台的选择省级节点与上级节点以及下级节点之间的通信平台可以有多种选择，其中主要有公用电话网（ＰＳＴＮ）、分组交换网（ＣＨＩ－ＮＡＰＡＣ）和数字数据网（ＣＨＩＮＡＤＤＮ）。此...
INTERNET provincial node preliminary design (below) Zhang Zhong (State Science and Technology Information Division of new technology office) Sixth, the choice of communication platform Provincial node and the superior node and the lower node communication platform can have a variety of options, including the main There are public switched telephone network (PSTN), packet switched network (CHI-NAPAC) and digital data network (CHINADDN). this...