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Question No : 1
A. Network element can not track the clock
B. Clock protection switching occurs frequently
C. Network element reports alarm of clock signal loss
D. The generation of pseudo-synchronization phenomenon
Question No : 2
Question No : 3
A. General dust screen can be directly pulled out
B. Paste the sponge on the dust shield can not be torn directly after the water rinse
C. After the cleaning process is complete, reattach the sponge to the dust shield
D. Cleaning the dust screen is usually 6 months at a time.
Question No : 4
A. Software loopback: through the network management, the command line setup loopback
B. Hardware loopback: use the pigtail, self-loop cable for loopback operation on the optical interface, electrical port
C. The optical/electrical interface location of loopback in software and loopback in hardware are the same, while the signal flow is the same
D. The software loopback is automatically relieved in 5 minutes, and some of the boards do not support software loopback
Question No : 5
Question No : 6
Question No : 7
Question No : 8
Question No : 9
Question No : 10
Question No : 11
Question No : 12
Question No : 13
A. All external BITSs are assigned a clock ID
B. All internal clock sources with external BITS nodes are assigned a clock ID
C. All the nodes internal clock sources that enter into another ring network from the chain or the ring network are assigned a clock ID
D. All the nodes that enter into another ring network from the chain or the ring network, If there is a ring line clock source in the clock trace level, the line clock source of the incoming ring should be assigned a clock ID, for example, the clock ID is set to 16.
Question No : 14
A. Protection group parameter configuration is wrong
B. Protect the board from failure
C. Intersection board failure
D. Main control board failure
Question No : 15