多项选择题
Which three timing modes are supported on the ONS 15454 shelf？ （）
A. line timing
B. loop timing
C. internal timing
D. through timing
E. external timing
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相关考题
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单项选择题
TheML-seriesEthernetcardontheONS15454providesupto（）activeQ-in-Qinstancespercard.
A. 512
B. 255
C. 1024
D. 4096 -
单项选择题
You are installing a Cisco ONS 15454 SDH in a service provider site. An E3 cable is being connected to a digital cross-connect system. What is the maximum distance allowed between the two？（）
A. 225 ft
B. 450 ft
C. 655 ft
D. 900 ft -
单项选择题
WhyisanSTM-12F-MS-SPRingNOTfeasible？（）
A. An equal amount of working and protect bandwidth is required.
B. DCC bandwidth is not large enough to handle K1/K2 processing.
C. Switch times would exceed 50 ms for an STM-1 MS-SPRing ring.
D. There is not enough bandwidth in an STM-1 ring to justify MS-SPRing protection.
