问题描述:
[多选]
在工程中,能实现的OPCS通道保护倒换触发条件是In one engineering, the conditions that trigger the OPCS protection switchover are()
A.OPA输入无光告警;OPA no optical input power alarm
B.OSC无光告警;OSC no optical power alarm
C.OPCS工作通道输入无光告警;no optical power alarm in the OPCS working channel
D.OTU大误码;OTU big code error
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答案解析:无
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