Free Practice Questions for Huawei H31-341_V2.5 Exam

The intermediate flatness method targets maintaining the single-wavelength input optical power within ±2 dB of the nominal value to ensure balanced power distribution and optimal system performance.

The loopback method can substitute or bypass components such as fibers, boards, adapters, attenuators, or power supplies to isolate and verify signal paths during troubleshooting.

For a 100 Gbit/s signal using PAM4 modulation, each symbol carries 2 bits, effectively halving the baud rate compared to the bit rate. Additionally, using dual polarization halves the required baud rate again. Therefore, the calculation 100 ÷ 2 ÷ 2 = 25 Gbaud/s is correct.

Ensuring the downstream OA’s input is within the specified range by first reducing upstream EVOA attenuation is the standard first step when output power falls short at minimum gain.

If adjusting the EVOA does not bring the OA’s output into spec, increasing the OA’s gain is the next appropriate action.

When the OA meets output requirements at its minimum gain setting, the preceding fiber’s incident power must be at or above the lower limit defined by the incident-power specifications.

A ROADM (Reconfigurable Optical Add-Drop Multiplexer) site is a key component in flexible optical networks. It allows the flexible adding and dropping of wavelengths within the site (A), enhancing network agility. It supports automatic optical power adjustment (B), which helps maintain signal quality across the network by balancing power levels and avoiding distortion. Also, when optical-layer ASON (Automatically Switched Optical Network) is required, ROADMs must be used (C) to provide dynamic wavelength routing and switching capabilities. However, ROADMs are not mandatory for electrical-layer ASON, so (D) is false. These features collectively enable efficient, dynamic optical networking with minimal manual intervention, critical in advanced transmission scenarios covered by HCIP-Transmission.

The formula to calculate the OTUk frame rate is: OTUk frame rate = 255 / (239 - k) × STM-N frame rate. Here, "k" represents the OTUk version index, and STM-N is the synchronous transport module rate. This formula derives from the OTN standard, adjusting the frame rate according to the version and allows synchronization with underlying SDH/SONET rates. HCIP-Transmission materials provide this formula for engineers to correctly understand and calculate transmission rates for different OTN layers.

dBm = 10·log10(500 mW) = 10·(log105 + 2) = 10·(0.7 + 2) = 27 dBm.

Abnormal optical power can be caused by external factors such as (A) bent optical cables causing increased attenuation or microbends, (B) contaminated connectors reducing transmission efficiency due to dirt or dust, and (C) old optical fibers suffering from aging and degradation that increase loss. (D) Crossed pairs on the ODF (Optical Distribution Frame) is more related to wiring errors but may not directly cause optical power anomalies. HCIP-Transmission stresses proper handling and maintenance of fibers and connectors to maintain optimal optical power levels and network reliability.

A multimeter is used to verify the equipment’s electrical power and grounding.

An optical power meter measures the received optical power levels on each wavelength.

An optical spectrum analyzer checks the wavelength spacing, channel power, and spectral purity during WDM commissioning.

With an initial RI1–RI2 difference of 2 dB and a 5 dB threshold, only when the active channel’s loss increases by 7 dB (to 3 dBm) while the standby remains at 8 dBm does the difference reach 5 dB and trigger switching.