The reasons for the discrete business are? (Multiple choice)

• A.The logical fiber connection of the network element is inconsistent with the physical fiber connection.
• B.The cross-connection configuration on the network element is wrong.
• C.The network element side configuration data is not uploaded to the U2000.
• D.There is an outbound subnet service whose source or sink port is not within the scope of network management.

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The following is the client-side logical port of the board in the standard mode.

• A.RX/TX-n
• B.n(Nn/OUTn)-OCH: 1-ODUk: m-ODUp:a
• C.ODUkLP-n
• D.ClientLP-n

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

• A.AU-PTR refers to the location of the J0 byte.
• B.Since the value of the AU-PTR pointer is placed in the last 10 bits of the two bytes H1 and H2, the valid value is 0~1023.
• C.If the receiving end detects that the H1H2 byte is all "1", the local end generates an AU-AIS alarm.
• D.The root cause of the AU pointer adjustment is that the clocks between the upstream and downstream stations are not synchronized.

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In a WDM system, after a distance of transmission, the OSNR of the signals at the receive end decreases to a certain extent. Which of the following is the main cause?

• A.New optical fiber is not used.
• B.The fiber attenuation is too large.
• C.Use of Demultiplexer Multiplexer
• D.Use of EDFA

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If tunnel APS is configured for the tunnel to which the PW belongs, PW APS cannot be configured for the PW.

• A.False
• B.True

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