單項(xiàng)選擇題

You are provisioning an E-1 circuit on an ONS 15454 MS-SPRing configuration and XC-VXL-10G card. Each VC-12 connection must also terminate via the VC-3 matrix.
 How many VC-3 ports remain after this circuit is created, assuming no other circuits?()

A. 92
B. 93
C. 94
D. 95
E. 96


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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.

3.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
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E. external timing

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