Which of the following is the data that needs to be collected and saved in the event of a failure? (Multiple Choice)

• A.Operation log of the network management
• B.Equipment alarms and performance events
• C.Configuration data of the NE and the board
• D.Running status data of the NE and the board

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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.Improper configuration of the DCM will result in degradation of the receiving end performance.
• C.10G system with line fiber length less than 400km, G.652 DCI can be used to compensate G.655LEAF).
• D.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.

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Which of the following paths can be configured on the network management? (Multiple Choice)

• A.OCh
• B.Client
• C.ODUk
• D.OTS

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In the WDM networking design, as long as there are enough EDFA cascades to compensate for the loss of optical power during transmission. Then the system can transmit a long distance without restriction.

• A.TRUE
• B.FALSE

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In the non-aggregated OTU processing SDH standard signal scenario, both A and B are WDM stations, and the R_Los alarm is detected on the client side of the OTU of the A station. After the alarm is processed on the WDM side of the OTU, the client side of the downstream B station detects and reports the REM_SF alarm, and the B station transmits the signal to the downstream client device and reports the R_LOS alarm to the client device.

• A.TRUE
• B.FALSE

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