Path method creates OCh failure, what are the possible reasons? (Multiple Choice)

• A.There are still unremoved alarms in the boards involved in OCh.
• B.No service layer path
• C.Some pigtails are not connected
• D.Inconsistent wavelength setting at both ends of source and sink

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Which of the following boards can be inserted on the OSN 9800 U64 subrack?

• A.TN18LSC
• B.TNV1N401
• C.TN54GS4
• D.TNF 5UNQ2

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ESC can also be used at OLA sites.

• A.True
• B.False

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The working mode provided by the line fiber quality monitoring function does not include _____.

• A.Automatic mode
• B.Intra-office mode
• C.Manual mode
• D.Near-end mode

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After starting the extended SSM protocol, in addition to determining the clock quality level and priority, the clock ID is also determined. After receiving the clock signal with the ID, the network element considers that the source is unavailable if it is judged to be the clock signal sent by the station. In this way, even after passing through multiple sites, the network element can still recognize the clock signal sent by itself, preventing the formation of a timing loop.

• A.FALSE
• B.TRUE

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