H31-321_V1.0-ENU

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The dumps for H31-321_V1.0-ENU exam was last updated on Apr 06,2026 .

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Question#1

Which of the following describes the unique advantage of Huawei's Fiber Doctor (FD) technology in proactive optical layer O&M?

A. It eliminates the need for any optical amplifiers by utilizing a proprietary "super-transparent" glass technology in the patch cords.

B. It integrates Online OTDR to enable high-precision fiber defect localization and attenuation analysis during live network operation without service disruption.

C. It employs high-power infrared sensors combined with automated micro-repair mechanisms to physically repair micro-cracks in the fiber cladding without human intervention during field operations.

D. It provides real-time monitoring and diagnostic analysis of ODUk overhead bytes―including TTI, BIP-8, and STAT fields―to detect logical routing errors and interoperability issues across multi-vendor OTN equipment.

Question#2

On a chain network, if the SCC board on an intermediate station becomes faulty and the line boards of the station are installed in paired slots, which of the following methods can be used to ensure normal ECC communication between the other stations?

A. Reseat the faulty SCC board.

B. The D byte can automatically pass through, because a protection overhead bus is available between the paired slots. Therefore, no extra operation is required.

C. Remove the faulty SCC board.

D. Delete the faulty SCC board on the NM

Question#3

A field maintenance technician is performing an audit of a fixed OADM site. The site is intended to "Drop" Channel 33 to a local client.
The technician observes the following internal fiber patching between the boards:
```
FIU (West) -> MR2 (Filter Board) -> Line Out (to East)
MR2 (Drop Port) -> OPA (Pre-amplifier) -> DEMUX Port 33 -> Transponder
```
Which configuration or patching error represents an "anti-pattern" that will cause performance degradation?

A. Placement of the OPA (Pre-amplifier) after the MR2 filter board may cause elevated ASE noise accumulation on the dropped channel.

B. Standard practice requires the OPA before the MR2 board; positioning it after the filter increases noise figure due to amplification of an attenuated signal.

C. At the OADM site, directly connecting the FIU board to the MR2 board without a dedicated Raman pump laser is acceptable in standard EDFA-based amplifier configurations and does not constitute a performance-affecting error.

D. Directly patching DEMUX port 33 to a transponder without a 1:2 optical splitter is permissible in non-protected configurations and does not impact signal performance.

Question#4

Which of the following is false about the safe use of fibers?

A. Use dedicated tools and materials to clean fiber connectors and the optical ports of lasers.

B. Use optical attenuators if receive optical power is too high.

C. An optical module that is recessed straightly can be directly connected to an optical attenuator.

D. Connect an optical attenuator to an IN port, not OUT port.

Question#5

Which of the following statements is false about a network-level protection switching test?

A. Before a 1:1 linear MSP switching test, set the switching mode to single-ended.

B. During linear MSP switching, the NE reports the APSJNDI and MS_APS_INDI_EX alarms.

C. A network is configured with SNC

D. When the laser of the peer port is disabled, the SDH analyzer

E. connected to the local port indicates a transient service interruption.

F. Methods of testing MSP switching include single-ended loopback tests and dual-ended analyzer tests.

Exam Code: H31-321_V1.0-ENU Q & A: 213 Q&As Updated: Apr 06,2026

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Exam Code: H31-321_V1.0-ENU
Q & A: 213 Q&As
Updated: Apr 06,2026

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