Which technology can provide synchronization support in TD-SCDMA network?

• A.SDH
• B.ACR/TOP
• C.Ethernet Physical Layer Synchronization
• D.IEEE 1588V2

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In the PTN network, how many CES services can a PW carry at most?

• A.innumerable
• B.Article 5
• C.Article 2
• D.Article 1

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Which of the following is wrong about the comparison between Raman amplifiers and EDFAs?

• A.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
• B.The gain calculation/testing method of Raman amplifier and EDFA is consistent, both are "gain = output power - input power"
• C.The gain medium of Raman amplifier is transmission fiber: while the gain medium of EDFA is EDF (Erbium Doped Fiber)
• D.The equivalent noise figure of the Raman amplifier is smaller than that of the EDFA

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DCM optical power debugging requires the input of DCM to be no greater than which of the following values?

• A.-2
• B.-4
• C.-5
• D.-3

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Which of the following statements is incorrect about the optical layer interfaces OTM-nm and OTM-nrm of OTN?

• A.r means OTM without OSC function
• B.n represents the number of wavelengths carried by the maximum capacity,
• C.m represents the rate. Value can be 1.2 or 3.
• D.OTM-nr.m with OSC signal is OTM-nm.

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