Which of the following monitoring boards do not support the processing and transparent transmission of 1588V2 signals? (Multiple choice)

• A.ST2
• B.SC1
• C.SC2
• D.AST2

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Which of the following statements about the advantages of OTN are wrong?

• A.OTN provides up to five levels of nested or overlapping TCM connection monitoring.
• B.WDM function is used to meet the requirement of Tbit/s bandwidth per fiber.
• C.OTN provides high-speed interfaces of 2.7 Gbit/s, 10.7 Gbit/s, 43 Gbit/s and even 111.8 Gbit/s.
• D.OTN provides powerful out-of-band FEC function to effectively ensure line transmission performance.

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Which of the following description of the single station commissioning is wrong?

• A.If the input voltage of the equipment is not within the required range, suggestions for rectification should be proposed.
• B.In case of power failure, the contact board can be used without anti-static wrist or anti-static gloves.
• C.Single station hardware check is complete, make sure all power switches are in the off position
• D.It is strictly forbidden to plug and unplug the power plug and PIU board.

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The packet protection features supported by the OSN 1800V include _______. (Multiple choice)

• A.LAG
• B.Tunnel APS
• C.PW APS
• D.TPS

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Which of the following is not a PW APS switching condition?

• A.A cold reset is performed on the board.
• B.MPLS_PW_SF
• C.The board software is faulty.
• D.A warm reset is performed on the board.

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