There are two NG-SDH network elements A and B.
A is a gateway network element.
The network manager manages B through ECC routing through A.
The network manager can log in to A, but cannot log in to B through A.
What are the possible reasons? (multiple choice)

• A.Manually set up ECC routing
• B.Cross-connect board is not inserted
• C.The optical board connected to B does not create a logical board
• D.The main control board is abnormal

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What should I pay attention to when swapping antennas? (multiple choices)

• A.If the microwave link adopts a 1+1 protection configuration and uses one antenna, turn off the power of the backup ODU before switching the antenna
• B.During the commissioning period, there is no rain/snow/fog impact between the two sites
• C.ATPC function is off
• D.Turn on AM function

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The TE link in the OTN electrical layer ASON is unidirectional. For example, there are two TE links between NS2 and NS2. The final number of links is the number of intelligent N-board ports (including relay N-board).

• A.FALSE
• B.TRUE

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Which of the following are the functions of MPLS-TP OAM? (multiple choice)

• A.LB
• B.Traceroute
• C.LT
• D.Ping

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All on-site operations can be performed according to their own experience, and there is no need to strictly follow the change operation steps

• A.FALSE
• B.TRUE

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