Free Huawei H31-341_V2.5 Practice Exam with Questions & Answers | Set: 4

ODUflex is a flexible OTN (Optical Transport Network) container designed to improve bandwidth utilization by allowing users to configure capacity based on actual service volume (A). Unlike fixed containers, ODUflex’s rate is adjustable to fit various service rates, improving efficiency and reducing waste. However, the ODUflex rate is defined as N × 1.25 Gbit/s where N is variable, but this option was not listed as correct here. Importantly, the TOA board does support ODUflex, contradicting option D. The key benefits of ODUflex include flexible capacity and improved bandwidth utilization (C), making these the correct points as per HCIP-Transmission standards.

The TMB1AST2 board is a specialized optical module used in transmission equipment. According to HCIP-Transmission references, all the statements about this board are correct. (A) The TM1 optical port must be connected to the TMI1 optical port for proper operation. (B) It supports IEEE 1588v2 clock processing, essential for precise time synchronization, and includes OTDR (Optical Time Domain Reflectometer) functions for fiber fault detection and maintenance. (C) When working with DFIU03/DFIU04 boards, the OSC optical port requires an optical module that supports the 1511 nm wavelength to ensure wavelength compatibility. (D) Similarly, when working with DSFIU01/DSFIU02 boards, the TM1/RM1 and TM2/RM2 ports must use optical modules supporting 1511 nm and 1491 nm wavelengths respectively, ensuring correct wavelength assignment for WDM channels. This detailed configuration ensures interoperability and proper system functionality.

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 power difference becomes 6 dB (2 dBm – (–4 dBm) = 6 dB), which exceeds the 5 dB threshold, so protection switching occurs.

OTN overhead (ODUk/OTUk) belongs to the OTN layer, not the optical layer, so OOS overheads do not include OTN overhead.

It is false that output optical power of a site must be as high as possible to ensure signals reach the peer site. Excessively high output power can cause nonlinear effects, such as four-wave mixing and self-phase modulation, degrading signal quality. Optimal power levels must be maintained within equipment specifications to balance reach and signal integrity. HCIP-Transmission stresses careful power management, including gain control and attenuation, to maximize network performance without introducing impairments.