What is the correct relative switching priority in a BLSR 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
正确答案:A
答案解析:有
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