ODUk_PM_AIS alarm is one of the conditions for ODUK_SNCP switching

• A.FALSE
• B.TRUE

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Four network elements A, B, C, and D form an SNCP ring, and there are a large number of PDH services between A and B.
One day, the fiber between A and B was interrupted.
In order to eliminate the R-LOS alarm on the network management system, an engineer self-looped the optical ports at both ends of the interrupted fiber. After 10 minutes by default, what will happen?

• A.The services of A and B will not be affected, and the switching alarm will not disappear
• B.The service between A and B is interrupted, and the switching alarm disappears
• C.The business between A and B is not affected, and the switching alarm disappears
• D.The service between A and B is interrupted, and the switching alarm does not disappear

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What should be paid attention to when planning a 1588V2 network?

• A.It is recommended to adopt BC mode for the whole network in the networking mode
• B.BMC algorithm must be activated to prevent looping
• C.1PPS + TOD interface is more suitable for internal transmission of the network
• D.In practical applications, there may be a distance difference between the two directions of the fiber optic transceiver, but there is no need to compensate for this. 1588V2 will automatically calculate it according to the algorithm

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GetEventChannel belongs to which step in the working principle of CORBA?

• A.Session maintenance
• B.Information query
• C.Session announcement
• D.Session initialization

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Regarding the optical power commissioning of the RAU2 board, which of the following options is correct () (multiple choice)

• A.When using MONO or MOWS to measure online optical power, 20dB compensation is required
• B.Because the RAU2 board has built-in EVOA, the Raman gain needs to be directly set to the maximum gain of the supported fiber type
• C.Before turning on the Raman laser, make sure that the connectors are connected well
• D.Before commissioning the RAU2 board, the team function must be disabled first, and then the Raman board laser must be turned off

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