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单选题
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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What is the correct relative switching priority in a BLSR ring (higher to lower)?()
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考题
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考题
What is the correct relative switching priority in a BLSR ring (higher to lower)?（）A、signal fail, signal degrade, manual switchB、signal degrade, signal fail, manual switchC、protection lockout, manual switch, path AISD、forced switch, manual switch, signal degradeE、protection lockout, manual switch, forced switch
考题
In which of the following lists of APS Action Requests is the priority correctly arranged from lowest tohighest？（）A、Wait-to-Restore，Forced Switch，Manual Switch，Lockout of ProtectionB、Manual Switch，Wait-to-Restore，Lockout of Protection，Forced SwitchC、Lockout of Protection，Forced Switch， Manual Switch，Wait-to-RestoreD、Lockout of Protection，Manual Switch， Forced Switch，Wait-to-RestoreE、Wait-to-Restore，Manual Switch，Forced Switch，Lockout of ProtectionF、Wait-to-Restore，Manual Switch，Lockout of Protection，Forced Switch
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考题
What is the correct relative switching priority in an MS-SPRing ring （higher to lower）？ （）A、 signal fail， signal degrade， manual switchB、 signal degrade， signal fail， manual switchC、 protection lockout， manual switch， path AISD、 forced switch， manual switch， signal degradeE、 protection lockout， manual switch， forced switch
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考题
What protection method is used in 4F MS-SPRing networks？（）A、 Each fiber has half of its capacity reserved for protection.B、 Two fibers carry their full capacities while the other two fibers are reserved for protection.C、 The signal is sent simultaneously in both directions around the ring. The receiver determines which fiber to listen to based on signal quality.D、 The signal is sent simultaneously in both directions around the ring. The transmitter determines which fiber has the working bit set for the receiver to acknowledge.
考题
When comparing DSL broadband to cable broadband, which of the following is an advantage ofDSL broadband?（）A、Upgraded copper lines allow maximum speed greater than cableB、Signal is not shared back to the switchC、Signal is shared back to the switchD、Distance is not a factor in signal speed
考题
单选题What is the correct relative switching priority in a BLSR ring (higher to lower)?（）A
signal fail, signal degrade, manual switchB
signal degrade, signal fail, manual switchC
protection lockout, manual switch, path AISD
forced switch, manual switch, signal degradeE
protection lockout, manual switch, forced switch
考题
单选题What protection method is used in 4F BLSR networks?（）A
Each fiber has half of its SONET capacity reserved for protection.B
Two fibers in the span carry working traffic, while the other two fibers in the span are reserved for protection.C
The signal is sent simultaneously in both directions around the ring. The receiver determines which fiber to listen to based on signal quality.D
The signal is sent simultaneously in both directions around the ring. The transmitter determines which fiber has the working bit set for the receiver to acknowledge.
考题
单选题What does a broad-spectrum interferer lower？（）A
SNRB
noise floorC
level of interferenceD
Received Signal Strength Indicator
考题
单选题What is an advantage of an externally modulated laser over a directly modulated laser？ （）A
lower costB
higher chirpC
easier to manufactureD
higher dispersion toleranceE
higher optical signal-to-noise ratio
考题
单选题In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?（）A
the signal to noise of the current optical amplifierB
the signal to noise of the previous amplifier or sourceC
the signal to noise introduced by the optical multiplexerD
the accumulated noise to signal ratio of the optical channel
考题
单选题In which of the following lists of APS Action Requests is the priority correctly arranged from lowest tohighest？（）A
Wait-to-Restore，Forced Switch，Manual Switch，Lockout of ProtectionB
Manual Switch，Wait-to-Restore，Lockout of Protection，Forced SwitchC
Lockout of Protection，Forced Switch， Manual Switch，Wait-to-RestoreD
Lockout of Protection，Manual Switch， Forced Switch，Wait-to-RestoreE
Wait-to-Restore，Manual Switch，Forced Switch，Lockout of ProtectionF
Wait-to-Restore，Manual Switch，Lockout of Protection，Forced Switch
考题
单选题What protection method is used in 4F MS-SPRing networks？（）A
Each fiber has half of its capacity reserved for protection.B
Two fibers carry their full capacities while the other two fibers are reserved for protection.C
The signal is sent simultaneously in both directions around the ring. The receiver determines which fiber to listen to based on signal quality.D
The signal is sent simultaneously in both directions around the ring. The transmitter determines which fiber has the working bit set for the receiver to acknowledge.
考题
单选题In the OSNR model for EDFA amplifiers， SNR OUT = 1/（1/SNR IN + FhvB/P IN ）， what does SNR IN represent？（）A
the signal to noise of the current optical amplifierB
the signal to noise of the previous amplifier or sourceC
the signal to noise introduced by the optical multiplexerD
the accumulated noise to signal ratio of the optical channel
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