Which of the following are limitations of the alarm and performance analysis methods? (Multiple Choice)

• A.Field maintenance personnel cannot understand the current operating condition of the equipment.
• B.When some faults occur, there may be no obvious alarms or performance events reported, and sometimes no alarms or performance events are found.
• C.In the case of complex networking, service, and fault information, many alarms and performance events may occur along with the occurrence of faults. Due to too many reports and performance events, maintenance personnel are unable to analyze.
• D.The network administrator cannot obtain the current notifications of the device, the alarm occurrence time, and the historical alarm of the device.

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Which of the following ROADM boards have WSS optical modules? (Multiple Choice)

• A.WSMD9
• B.RDU9
• C.WSD9
• D.WSM9

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In general, which of the following operations will cause a short interruption in monitoring of existing network devices? (Multiple Choice)

• A.Hardware loopback
• B.Hard reset main control board
• C.Software loopback
• D.Soft reset main control board

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ODUk SNCP protection cannot be automatically switched. The possible reasons are: (Multiple Choice)

• A.Waiting for the recovery time to be set too long
• B.Set the lock or forced switch command
• C.SNCP type setting error
• D.Electrical cross configuration error

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

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

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