Which of the following Optical NE types are defined in U2000?

• A.WDM_OEQ
• B.WDM_OLA
• C.WDM OADM
• D.WDM_OTM

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Which of the following alarms will trigger the optical line protection switching? (Multiple choice)

• A.MUT_LOS
• B.POWER DIFF_OVER
• C.R_LOS
• D.R_LOF

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For the MSTP equipment, the pass-through mode is used for VC-4 services by default, and the termination mode is used for VC12/VC3 services by default.

• A.True
• B.False

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The following description of the Flexible ROADM, which is wrong?

• A.Improve spectrum utilization and meet flexible scheduling requirements in the future era of over 100 Gbit/= rate.
• B.WSMD2 board supports F1exible ROADM configuration
• C.Flexible grid technology provides flexible bandwidth settings and flexible bandwidth allocation and scheduling.
• D.DFlexible ROADM is compatible with existing networks

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Generally, in the NG WD system, the full-wave fiber input power is generally less than 20dBm. What is the main reason?

• A.To avoid nonlinear effects
• B.In order to extend the life of the laser of the board
• C.In order to protect the cable
• D.In order to maintain the personal safety of personnel

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