同时系统具有多种报警形式，并具有自动切换光纤的功能。
The same time, the system had many alarm forms and function of automatic switch fiber.
以苏州电力光纤通信网西外环为对象，研究了各种通道故障下复用段保护切换、恢复过程中通道时延的变化情况。
Taking the Suzhou power fiber optic communication grid as the object of research, this paper studies the transmission delay during protection and recovery in various channel failures.
分析了影响光纤电流纵差保护正常的原因，提出了旁代时通道的切换方案以及日常运行管理的几点建议。
Analysis of factors impacting on operation of optic protections, putting forward channel switch scheme of fiber protection when bypass breaker as line breaker.
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