Which of the following reasons does not cause optical power anomalies?

• A.Enable FEC function
• B.Pigtail connection error
• C.The pigtail is too large
• D.Equipment temperature is too high

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The troubleshooting methods that can be used to separate external faults are:

• A.Meter Test
• B.Replacement
• C.Configuration Data Analysis
• D.Loopback

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WDM multiplexes optical signals at multiple rates (wavelengths) through a single fiber for transmission. The digital signals carried by these optical signals must have the same rate and data format.

• A.TRUE
• B.FALSE

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MG-SDH digital single core can be expanded by software upgrade.

• A.False
• B.True

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What are the basic principles of MSTP device fault location? (Multiple choice)

• A.Network first, then network element
• B.External first, then transfer
• C.Low speed first, then high speed
• D.Advanced first, then low level

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