單項(xiàng)選擇題What is the correct relative switching priority in an MS-SPRing ring (higher to lower)? ()

A. signal fail, signal degrade, manual switch
B. signal degrade, signal fail, manual switch
C. protection lockout, manual switch, path AIS
D. forced switch, manual switch, signal degrade
E. protection lockout, manual switch, forced switch


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3.單項(xiàng)選擇題What is the difference between 1+1 and 1:1 protection switching?()

A. 1+1 is based on APS, while 1:1 is based on IPS.
B. 1:1 is used in SNCP switching, while 1+1 is used in MS-SPRing switching.
C. 1+1 sends signals on Working and Protect paths, while 1:1 sends signals only on Working path.
D. 1+1 sends signals on Working path ONLY, while 1:1 sends signals on both Working and Protect paths.

5.單項(xiàng)選擇題Which timing mode is most appropriate for an ONS 15454 that has lost its BITS-1 and optical references?()

A. line timing
B. loop timing
C. internal timing
D. through timing
E. external timing

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If the power is 0 dBm, what is the power in mW?()

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How is a Thin Film filter fabricated? ()

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Click the Exhibit button. The exhibit shows a 15454/15216 DWDM system and alarm indications. What are two possible sources of trouble shown in the system?()

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In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?()

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A VC-4-4c consists of ().

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In order to avoid misconnections due to a failed node in an MS-SPRing, Alarm Indication Signals (AISs) are sent on every channel normally terminating in that node. What is the name of this process?()

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Which two can be transported in one AU-4? ()

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