Free Huawei H31-321 Exam Dumps Questions & Answers

An SNCP ring and an MSP ring are tangent. Which of the following are true about inter-ring service configuration on the tangent node?

• A.Configure one SNCP group for the service from the SNCP ring to the MSP ring.
• B.Configure bidirectional cross-connections in dual transmission mode for the service from the MSP ring to the SNCP ring.
• C.Configure two SNCP groups for the service from the SNCP ring to the MSP ring.
• D.Configure unidirectional cross-connections in dual transmission mode for the service from the MSP ring to the SNCP ring.

NG-SDH equipment supports -48 V and -60 V power inputs. For OSN 3500, you can set the monitoring range of power input voltage by setting the power jumpers of N3GSCC. For -48V power input, you need to remove the caps of jumpers J30 and J31.

• A.TRUE
• B.FALSE

Which of the following may cause abnormal ECC communication?

• A.The local NE uses Dl to D3, but the peer NE uses D4 to D12.
• B.The optical port reports the B3_SD alarm. What may cause the HPJ.OM alarm?
• C.The two interconnected optical boards have different rates.
• D.The local NE uses Dl to D3, but the peer NE uses Di to D3 and D4 to D12.
• E.The DCC bytes of the optical board have been deleted.

On NG-SDH equipment, when a cross-connect board that is configured with equipment-level protection (such as TPS, BPS, PPS, and DLAG) is replaced, the services carried by the board will not be interrupted.

• A.TRUE
• B.FALSE

Which of the following statements are false about clock configuration guidelines?

• A.The backbone layer and convergence layer must be configured with clock protection and with master and slave clock sources, which are used for clock protection switching.
• B.If a line clock source needs to be traced, ensure that the clock tracing route must be the shortest.
• C.Tributary signals are used for timing between sites.
• D.Wander does not occur in the clock signals that have been transmitted over multiple sites.
• E.An NE that is connected to a BITS clock or a high-precision external clock will trace an external clock source.