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铁路有线通信传输网络主要采用基于SDH同步数字体系的传输设备进行组网和搭建。详细介绍了SDH传输网的组网形式和保护机制。
The railway wired communication transmission network mainly adopts the transmission equipment based on SDH synchronous digital system for networking and setting up. Described in detail SDH transmission network networking and protection mechanisms.