Free Huawei H31-341_V2.5 Practice Exam with Questions & Answers

Avalanche photodiode (APD) receivers are commonly used on OTU boards due to their high sensitivity. The input optical power range typically lies between -4 dBm (maximum) and around -28 dBm (minimum). Among the options, -4 dBm is within the acceptable input power range, ensuring the APD operates without saturation or damage. Optical powers too high can saturate the receiver, while too low powers cause poor signal-to-noise ratio. HCIP-Transmission specifies these ranges to ensure optimal receiver performance and avoid optical overload or underpower conditions.

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

Lower ground resistance indicates better grounding performance because it allows current to be conducted to the ground more quickly and efficiently. Good grounding is essential for equipment protection, system stability, and safety in transmission networks. A low resistance path reduces the risk of electrical shock, equipment damage, and signal interference. HCIP-Transmission underscores the importance of grounding quality as part of overall network infrastructure integrity and reliability, making low ground resistance a key objective in grounding design.

The RDU9 board is used for demultiplexing optical signals; however, it cannot dynamically demultiplex any wavelength to any port. Dynamic demultiplexing requires advanced ROADMs or wavelength selective switches capable of flexible mapping. The RDU9 has limited fixed demultiplexing functions and does not support arbitrary wavelength-to-port assignments. Therefore, the statement that it can dynamically demultiplex any wavelength to any port is false. This aligns with HCIP-Transmission technical references highlighting the capabilities and limitations of different demultiplexing hardware modules.

The OptiXtrans DC908 chassis supports both DC and AC power supply configurations, allowing it to operate as either a DC chassis or an AC chassis.

In ROADM terminology, a “colored” port is tied to a specific wavelength and cannot be tuned, so “colored” refers to fixed wavelength.

Gain of an Optical Amplifier (OA) measures how much the signal power is increased, typically expressed in decibels (dB), which is a standard unit for power ratios in optical systems.

The Optical Amplifier (OA) module inside an EMR8 board includes a critical function called "gain locking." This function ensures that when channels are added, dropped, or experience fluctuations, the gain of the remaining channels stays stable. Without gain locking, changes in one channel's power could inadvertently affect the amplification of other channels, causing signal degradation and uneven performance. Gain locking maintains consistent output power levels and improves overall system stability, which is vital in dense WDM networks. This function helps avoid cascading issues during dynamic network changes and supports reliable service delivery in HCIP-Transmission systems.

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.