The NS4 board features test includes: (Multiple choice)

• A.Receive sensitivity
• B.Center wavelength test
• C.Side mode suppression ratio
• D.-20dB spectral width test

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What are the functions of MPLS-TP OAM? (Multiple Choice)

• A.Fault management
• B.Alarm monitoring
• C.Performance monitoring
• D.Fault location

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When the optical cable between the FIU and the FIU fails, the optical layer alarm reported by the downlink site is (). (Multiple Choice)

• A.R_LOS
• B.OSC_RDI
• C.MUT_LOS
• D.OSC_LOS

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Which of the following statements about AU pointers are correct?

• A.The value of the AU-PTR pointer is placed in the last 10 bits of the HI and H2 bytes. Therefore, the valid value of the AU-PTR pointer is 0-1023.
• B.The root cause of the AU pointer justification is that the clocks of the upstream and downstream stations are not synchronized.
• C.If the receive end detects that the H1H2 bytes are "1", the local end generates the AU-AIS alarm.
• D.AU-PTR indicates the position of the JO byte.

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The wave division system complement to chromatic dispersion mainly adopts the DCM compensation method. The following statements about DCM dispersion compensation, which is wrong?

• A.Improper configuration of the DCM will result in degradation of the system signal-to-noise ratio.
• B.The DCM module is more likely to cause nonlinearity than the line transmission fiber, so it is necessary to strictly control its fiber-optic power.
• C.10G system with line fiber length less than 400km, G.652 DCI can be used to compensate G.655LEAF).
• D.Improper configuration of the DCM will result in degradation of the receiving end performance.

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