试题详情
- 单项选择题What is the correct relative switching priority in an MS-SPRing ring （higher to lower）？ （）
A、 signal fail， signal degrade， manual switch
B、 signal degrade， signal fail， manual switch
C、 protection lockout， manual switch， path AIS
D、 forced switch， manual switch， signal degrade
E、 protection lockout， manual switch， forced switch
- A
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