H31-321 Online Practice Questions and Answers

In a board replacement scenario, an SDH board is configured with ring MSP. Which alarm will be reported after a forced switchover?

A. APSJNDI

B. APS_MANUAL_STOP

C. R_APS

D. APS_FAIL

You need to collect and save field data in a timely manner during troubleshooting. What does the data include?

A. Cabinet alarm indicator status

B. Running status of NEs and boards

C. Configuration data of NEs and boards

D. Equipment alarms and performance events

E. NMS operation logs

On a network where MSP rings and SNCP rings share fiber resources, if Assigned by VC-4 is selected, you need to set holdoff time for SNCP services.

A. TRUE

B. FALSE

Which of the following statements are True about J1 and C2 bytes on NG-SDH equipment?

A. For VC-4 services, a line board detects both J1 and C2 bytes.

B. For VC-4 services, a line board does not detect J1 or C2 bytes.

C. For VC-12 services, a line board detects both J1 and C2 bytes,

D. For VC-12 services, a line board does not detect J1 or C2 byte.

Which of the following about the SSM protocol are true?

A. After the SSM protocol is disabled, the clock network can be unidirectional but cannot adopt a ring

B. topology.

C. After the standard SSM protocol is enabled, the clock network can be bidirectional but cannot adopt a ring topology.

D. After the extended SSM protocol is enabled, the clock network can be bidirectional and adopt a ring topology, which can be intersecting or tangent with other networks.

E. The SSM protocol has little to do with clock networks.

Two SNCP rings are tangent. How many SCNP protection groups must be configured on the tangent node to achieve protection for inter-ring services, assuming one fiber cut on two rings or one fiber cut per ring?

A. 2

B. 4

C. 6

D. 8

What may cause the HP_LOM alarm?

A. Services are not configured on upstream NEs.

B. The service level is set inconsistently at both ends.

C. The C2 byte to be transmitted on the terminal NE is 0x00, and the pass-through NEs are set to pass through the overhead.

D. The board (for example, a cross-connect board) is faulty, resulting in loss of the H4 byte or incorrect H4 byte.

What is the value of an AU-FTR pointer without frequency or phase difference?

A. 0

B. 521

C. 522

D. 782

What are the available types of RBS tests?

A. Regenerator section PRBS tests

B. Multiplex section PRBS tests

C. Higher order PRBS tests

D. Lower order PRBS tests

What is the line rate of 64-byte frames on an FE port of transmission equipment?

A. 148810 frames/s

B. 8128 frames/s

C. 156250 frames/s

D. 8160 frames/s