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

• A.True
• B.False

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The OTS path refers to the physical fiber connection between two adjacent OM/OD/OA on the main optical path.

• A.TRUE
• B.FALSE

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Which of the following features does the EX40 add than X40?

• A.Less occupied slots
• B.Support light layer crossing
• C.Support single channel optical power monitoring
• D.The number of combined waves is more

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Which of the following SOM systems is not monitored?

• A.Receive OTU input optical power
• B.Type of originating FEC
• C.Light performance flatness
• D.Main light path performance

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The shortcomings of traditional OTDR meters in measuring optical fibers are: (Multiple choice)

• A.Cannot be used for routine maintenance testing
• B.Business will be interrupted during measurement
• C.Manual interpretation is required, which requires high operator requirements
• D.Need inbound measurement

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