Pass the Huawei HCIP Transmission H31-341_V2.5 Questions and answers with CertsForce

After powering on, ensure the fan tray’s FAN indicator shows steady green (normal operation), fans are spinning properly, and airflow through both upper and lower parts of the subrack is unobstructed to maintain adequate cooling.

In OA-free systems, where no optical amplifiers are used, the lower threshold of the receive optical power of a line board or the WDM side of an OTU board is indeed the optical module’s receiver sensitivity plus 3 dB. This ensures a safety margin for stable signal reception and alarm triggering. Without optical amplifiers, signal levels are more susceptible to attenuation, so maintaining this margin helps prevent degradation due to low optical power. HCIP-Transmission highlights this threshold as a standard parameter for optical power management in non-amplified systems.

The electrical-layer structure of OTN frames follows the path: OTUk → ODUk → OPUk → Client. OTUk is the outer frame layer that carries ODUk (Optical Data Unit), which in turn contains OPUk (Optical Payload Unit). The OPUk holds the client signal payload. This hierarchical encapsulation supports transparent transport of client signals over optical networks. Understanding this sequence is essential for managing signal mapping and monitoring in OTN networks as outlined in HCIP-Transmission documentation.

A break in the shared fiber link causes loss of optical power in both transmit and receive directions, triggering optical loss alarms on OA and OSC boards at both ends.

OTUk_LOM (Loss of Multiframe) alarm is generated when frame alignment is lost; however, the statement that it occurs when the Frame Alignment Signal (FAS) is Out of Frame (OOF) for three consecutive milliseconds is false. The actual time threshold differs slightly according to standards and vendor implementations. HCIP-Transmission clarifies these alarm thresholds and conditions to ensure precise timing in fault detection, avoiding false alarms while providing timely notifications for network maintenance.

When a GE (Gigabit Ethernet) service is encapsulated into an OTN frame or an SDH frame structure, the client-side alarms reported are not different; they are consistent regardless of the encapsulation method. This consistency ensures reliable fault detection and service monitoring across different transport technologies. HCIP-Transmission specifies that client alarms depend on service and interface definitions rather than the underlying framing, ensuring seamless interoperability and troubleshooting in multi-protocol environments.

In an OA (Optical Amplifier) system, the lower threshold of the receive optical power for a line board with a PIN receiver or the WDM side of an OTU board is typically the optical module’s receiver sensitivity plus 3 dB, not 5 dB. Adding 3 dB accounts for margin to ensure reliable reception without unnecessary overdesign. The 5 dB margin usually applies when an APD receiver is used, which is more sensitive but also more susceptible to noise. Thus, for PIN receivers, HCIP-Transmission guidelines specify the lower threshold as sensitivity plus 3 dB to maintain signal quality while preventing false alarms or unnecessary protection switching.

The TNG2WSMD09 board is a 9-port wavelength selective multiplexer/demultiplexer for the Super C band and supports optical power adjustment and online optical power detection.

In burst mode, an OTUk_DEG alarm is triggered when bit errors cause signal degradation, even if the error count threshold isn’t crossed.

In burst mode, the alarm also occurs if the number of bit errors within the detection window exceeds the configured threshold.