H31-341 Online Practice Questions and Answers

In the scenario where the non-convergence OTU processes OTN standard signals, both A and B are WDM sites.The OTU at station A accesses four channels of R_LOS signals on the client side. After being processed in the middle part and on the WDM side of the OTU at station A, the alarm signals are then sent to station B. The ODUk_PM_AIS alarm of the corresponding channel is generated in the middle part of station B. The ODUk_PM_AIS alarm is detected in the client device.

A. True

B. False

Which of the following statements about the line fiber quality monitoring performance parameters is wrong?

A. The pulse width of emitted optical pulses varies according to monitoring modes, and affects the detection distance and measurement precision. A greater pulse width provides a larger dynamic range, longer detection distance and better measurement precision.

B. When the pulse width increases, the light emitting time increases and consequently a larger energy is obtained. This means that a larger dynamic range can be acquired but also larger dead zones will result.

C. Measurement is performed multiple times within the detection time. The average value is obtained based on the measurement results to improve the measurement precision. The actual duration from the time when a detection event starts to the time when the detection results are returned will be longer than the Detection time.

D. The total fiber loss will affect the detection distance and the dynamic range is fixed for the same detection mode. Therefore, a larger total fiber loss indicates a smaller detection distance.

In a WDM system, after a distance of transmission, the OSNR of the signals at the receive end decreases to a certain extent. Which of the following is the main cause?

A. Use of EDFA

B. The fiber attenuation is too large.

C. New optical fiber is not used.

D. Use of Demultiplexer Multiplexer

In the case of the OptiX OSN equipment, when the standby board is normal, which of the following operations does not cause the active/standby switching of the cross-connect board or clock board?

A. Delete the active cross-connect board or clock board logically.

B. Open the upper and lower ejector levers of the active board at the same time.

C. Deliver the active/standby switchover command.

D. Perform a cold reset on the cross-connect or clock board.

FXS and FXO are the names of the ports used by analog telephone lines. FXO ports and FXS ports are always used in pairs.

A. True

B. False

In the scenario where the non-convergence OTU processes OTN standard signals, both A and B are WDM sites. After receiving the OTUk_TIM alarm on the client side, the OTU board at station A sends the OTUk_BDI alarm to the upstream. When the TIM follow-up action is disabled, the alarm is no longer transmitted to the downstream. When the TIM follow-up action is enabled, an SF event is generated. The WDM side of the OTU board at station B reports the ODUk_PM_AIS alarm, and the ODUk_PM_AIS alarm is transmitted downstream. The client equipment reports this alarm. After the WDM side of the OTU board at station B receives the OTUk_TIM alarm and the TIM follow-up action is disabled, the alarm is no longer transmitted to the downstream. When the TIM follow-up action is enabled, an SF event is generated. After the client side of station B processes the SF event, the client equipment reports the ODUk_PM_AIS alarm.

A. True

B. False

What are the wavelengths of the OSC channel used by the ST2 board?

A. 1510nm

B. 1491nm

C. 1511nm

D. 1471nm

If OCh trails fail to be created by trail, which are the possible causes?

A. There are still alarms that are not cleared on the boards involved in the OCh.

B. The wavelength settings at the source and sink ends are inconsistent.

C. Some fibers are not connected.

D. There is no server trail.

If no bit error test is performed on a optical channel for 10 minutes, the local end uses the SDH analyzer to connect to the client-side port on the OTU board, the client-side port on the opposite OTU board need to be self-looped by a fiber. In the case of self-loop, a fixed attenuator must be added.

A. True

B. False

The protocols used in ASON are RSVP-TE, CSPF-TE, and LMP.

A. True

B. False