Which of the following statements about the main and backup channels of optical line protection is wrong?

Question

Options

• A"Initial Difference Between Active and Standby Channels (dB)"--the reference value used to set the
• B"Master-standby channel difference threshold (dB)" - used to set the difference between the main and
• CWhen the difference in the optical power of the full backup exceeds the threshold, the optical switch will
• DIf the current optical power difference between the active and standby channels exceeds the "main and

• A
  4% (1)
• B
  4% (1)
• C
  75% (18)
• D
  17% (4)

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