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具有交换功能的传输网络（续）──介绍数字交叉连接系统三、基本特性１．同步数字系列（ＳＤＨ）数字交叉连接系统（ＤＣＣ）是在同步数字系列（ＳＤＨ）基础上开发的，能转换所有传输系列之间的信息，包括准同步数字系列（ＰＤＨ）和新近开发的同步数字系列的（ＳＤＨ）...
Transmission Network with Switching Capabilities (Continued) - Introduction to Digital Cross-Connect System III. Basic Features Synchronous Digital Hierarchy (SDH) The Digital Cross Connect System (DCC) was developed on the Synchronous Digital Hierarchy (SDH) to convert information between all transmission families including the Synchronous Digital Hierarchy (PDH) and the newly developed Synchronous Digital Series (SDH) ...