FOADM includes parallel FOAD and serial FOADM, both supporting 40 waves or 80 waves of arbitrary wavelengths.

• A.FALSE
• B.TRUE

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Which of the following description of ODUflex are correct? (Multiple choice)

• A.The advantage of ODUflex is that users can flexibly configure the capacity of the container according to the size of the service to achieve the most efficient use of railway bandwidth.
• B.ODUflex bandwidth of per TS subslot is 1.25 Gbit/s
• C.Services supported by ODUflex range from 1.25 Gbit/s to 10 Gbit/s
• D.ODUflex refers to non-fixed bandwidth ODUk technology

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For ODUk SNCP protection, if the punch-through site is an electrical relay station, the SCP type is recommended to be configured as SC/I when configuring protection.

• A.FALSE
• B.TRUE

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Which of the following description of the process for optimizing the line attenuation compensation anomaly is correct? (Multiple choice)

• A.The SCC board at the downstream site of the fault reports the alarm to the power detection unit (OA) of the first node through DCN communication, and reports the alarm to the SOM on the SC of the first node.
• B.According to the user adjustment command, adjust the line attenuation of the OCh path to make the downstream light output reach the normal value.
• C.After receiving the alarm, the SOM obtains the OCh path corresponding to the alarm and adds it to the management path to be optimized.
• D.The downstream power detection unit (OA) detects that the line attenuation deviation exceeds the threshold and reports the alarm to its own SCC board.

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The following protection methods belonging to NG WDM optical layer protection are: (Multiple Choice)

• A.1+1 protection inside the board
• B.Customer side 1+1 protection
• C.ODUk SNCP protection
• D.Optical line protection

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