In the chain networking of Huawei NG-SDH equipment, if the SCC board of a single station is faulty, the site and the downstream site cannot log in.

• A.True
• B.False

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Which of the following optical loss alarms will not cause service interruption?

• A.CHAN_LOS
• B.R_LOS
• C.OSC_LOS
• D.MUT_LOS

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Regarding the comparison of Raman amplifiers with EDFAs, which of the following statements is false?

• A.The equivalent noise figure of a Raman amplifier is smaller than that of an EDFA
• B.The Raman amplifier selects different pump sources to amplify signals in different bands, so the Raman amplifier has no gain bandwidth limit in theory, while the EDFA has a range of gain bandwidth
• C.The gain medium of Raman amplifier is transmission fiber; the gain medium of EDFA is EDF (Erbium Doped Fiber)
• D.The gain calculation/testing method of Raman amplifier and EDFA is consistent, both are "gain = output power - input power

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Which of the following factors is related to pointer adjustment?

• A.Expenses
• B.Scrambling
• C.The clocks of each NE are not synchronized
• D.Rate

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Use a multimeter to check the resistance value between NEG1/2(-) and RTN1/2(+)/PGND of the PDU before powering on the device. If the resistance value is found to be less than 200, it means that there is a shortcircuit, and it is necessary to eliminate the fault before continuing the test.

• A.True
• B.False

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