In the electrical layer overhead processing-sink function, the signal flow is from the OCh to the client direction, the PM ODUkP is detected first, and then the TCM ODUkT is detected.

• A.FALSE
• B.TRUE

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Which of the following service layer paths is required when creating OCh using the path method?

• A.OMS
• B.Client
• C.ODUk
• D.OTS

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In the WDM system, after a certain distance of transmission, the optical signal-to-noise ratio of the receiving signal will be reduced to a certain extent. What is the main reason?

• A.Use of the splitter combiner
• B.Fiber attenuation is too large
• C.No new fiber is used
• D.Use of EDFA

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Which of the following signals can be used as input or output signals of an external clock interface?

• A.2.048 MHz
• B.34 Mbit/s
• C.155 Mbit/s
• D.2.048 Mbit/s

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The rigid pipes that MS-OTN equipment can provide are ________. (Multiple choice)

• A.0DUk
• B.Wavelength
• C.LSP
• D.PW

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