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铁路光传输系统采用同步数字系列SDH传输设备,为保障通信网的安全性和可靠性,采用复用段保护及子网连接保护。一般情况下,单路径故障或单板件故障不会影响业务。下面对一例复用段保护倒换不成功的典型故障进行分析。
The railway optical transmission system adopts synchronous digital series SDH transmission equipment. In order to ensure the safety and reliability of the communication network, the multiplex section protection and the subnet connection protection are adopted. In general, single-path or single-board faults do not affect the services. The following analysis of a typical failure of the multiplex section protection switching failure.