H31-321 Online Practice Questions and Answers

A ring is configured with STM-64 two-fiber bidirectional MSP. The port rate of the ring is 10 Gbit/s.

A. TRUE

B. FALSE

The actual optical power received should meet the requirements: (minimum sensitivity + 5 dB) < received optical power (tested) < (minimum overload threshold - 3 dB).

A. TRUE

B. FALSE

On a normal network, clock protection switching fails after the clock synchronization path is interrupted. As a result, lots of pointer justification events occur on related NEs. What are the possible causes for the failure of clock protection switching?

A. Incorrect fiber connections between boards

B. Optical power is incorrect.

C. The clock tracing modes are incorrect.

D. The network-wide clock protection switching protocols are incorrectly configured.

E. Hardware faults

A warm reset on a board does not affect running services, while a cold reset on a board affects running services.

A. TRUE

B. FALSE

Test timeout may occur when you use SmartBits to test data frames. To solve this problem/ you can reduce interframe gap (IFG) to enable higher rate of transmitting valid data packets on the equipment side. The minimum IFG is 96 bit time.

A. TRUE

B. FALSE

What working modes are supported by clocks of an SDH NE?

A. Synchronizing

B. Tracing

C. holdover

D. Free-run

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

A. 0

B. 521

C. 522

D. 782

Which of the following statements is false about pre-commissioning check?

A. Verify that the equipment is properly grounded.

B. An AUX board provides multiple RJ45 ports that receive same signals. Wrong port connections do not affect the equipment or boards.

C. On an AUX board, LAMP1 is the cabinet alarm indicator output port and LAMP2 is the cabinet alarm indicator cascading input port. Verify that the ports are connected correctly, to prevent short circuits.

D. Verify that the NMS is successfully installed.

Which of the following are true about the relationship between ASON software, board software, NE software, and NMS software?

A. ASON software is independent from board software, NE software, and NMS software.

B. NE software runs on a system control board.

C. All boards run ASON software and board software.

D. An NM computer runs NMS software

What are required to collect networking information during daily equipment maintenance of MSTP equipment?

A. Obtain the network topology diagram.

B. Check whether the network involves interconnection with third-party equipment. If such interconnection exists, check for configuration precautions and compatibility requirements.

C. Obtain engineering design documents, including slot diagrams, fiber connection diagrams, mapping between NE name, NE ID, and NE IP addresses, equipment room layout, and ODF/DDF port distribution diagrams.

D. Obtain historical information blocks of preventive maintenance inspection.

E. Obtain equipment data backup information.