Pass the Huawei HCPA-Transmission&Access H19-315 Questions and answers with ExamsMirror

A Passive Optical Network (PON) system consists of three primary components:

OLT (Optical Line Terminal):The central device located at the service provider's premises. It connects to the core network and manages communication with multiple ONUs.

ONU (Optical Network Unit):The customer-side device located at the user's premises. It converts optical signals into electrical signals for end-user devices.

ODN (Optical Distribution Network):The passive infrastructure that includes optical fibers, splitters, and connectors to distribute signals between the OLT and ONUs.

WDM (Wavelength Division Multiplexing) is a technology used in optical networks but is not a basic component of a PON system. It is often used in advanced PON systems like XG-PON or NG-PON2 to separate upstream and downstream wavelengths.

References:

ITU-T G.984 Standard - PON Architecture

Huawei PON System Design Guide

The statement isFalse. While theOptiXtrans E9600andOSN 1800are part of Huawei’s optical transmission portfolio, the1X908andE5800are not included under the OptiXtrans product line.

Here’s a clarification:

OptiXtrans E9600:A series of optical transmission devices designed for backbone, metro, and access networks.

OSN 1800:A compact optical transport platform for enterprise and carrier-grade applications.

1X908:This is not a recognized product in Huawei’s optical transmission portfolio.

E5800:Refers to a different product line, typically associated with access networks rather than optical transmission.

The confusion may arise from overlapping product names, but the OptiXtrans series specifically focuses on optical transmission solutions.

The minimum protection switching time forLink-layer Type B Switchingin GPON is50ms. Type B protection involves protecting the fiber link between the OLT and the splitter by providing redundant fibers. In the event of a fiber failure, the system switches to the backup fiber within 50ms to ensure minimal service disruption. This fast switching time is critical for maintaining high availability and reliability in GPON networks.

3s, 3min, 1min:These times are far too long for protection switching in modern optical networks, which require near-instantaneous recovery to meet SLA (Service Level Agreement) requirements.

The statement isFalse. TheNCE-FAN (Network Cloud Engine for Fixed Access Networks)does supportLocal High Availability (HA). Local HA ensures that the system remains operational even in the event of hardware or software failures, providing uninterrupted service delivery.

Key features of Local HA in NCE-FAN include:

Redundant Components:Critical components like control boards and power supplies are duplicated to prevent single points of failure.

Failover Mechanism:If the primary component fails, the backup component takes over automatically, minimizing downtime.

Data Synchronization:Real-time synchronization of configuration and operational data ensures seamless transitions during failover.

Local HA is essential for carrier-grade networks where high availability is a top priority. It complements other redundancy mechanisms, such as distributed architectures and remote backups, to ensure robust network performance.

The correct answer isRoom-like scenarios, including education, hotel, medical, apartment. Campus OptiX (POL) is primarily designed for enterprise campus environments where high bandwidth, low latency, and simplified network architecture are required. Common scenarios include:

Education:Connecting classrooms, dormitories, and administrative offices.

Hotels:Providing high-speed internet and IPTV services to guests.

Medical:Supporting hospital networks for patient care, imaging, and telemedicine.

Apartments:Delivering triple-play services (data, voice, video) to residents.

While options like video backhaul and Wi-Fi backhaul are valid use cases for optical networks, they are typically associated with carrier-grade solutions rather than enterprise-focused Campus OptiX deployments.

TheOSN 902is specifically designed for deployment inoutdoor cabinets, making it ideal for remote and harsh environments. Key features include:

Compact form factor and ruggedized design to withstand extreme temperatures and weather conditions.

Low power consumption and passive cooling, eliminating the need for air conditioning in outdoor cabinets.

Support for long-distance fiber connectivity, making it suitable for edge and access networks.

Other options likeOSN 9800,OSN 8800, andOSN 1800are typically deployed in indoor environments such as data centers or telecom rooms.

References:

Huawei OSN 902 Product Datasheet

Huawei Outdoor Deployment Best Practices

TheOptiXtrans DC908is specifically designed fordata center interconnect (DCI)applications, not backbone long-distance networks. Its primary use cases include:

Connecting geographically distributed data centers for cloud services, disaster recovery, and load balancing.

Supporting short-reach, high-capacity links (e.g., metropolitan areas) rather than ultra-long-haul backbone networks.

For long-distance backbone networks, Huawei offers other products like theOptiXtrans E9600 seriesorOSN 9800 series, which are optimized for higher capacities and longer distances.

References:

Huawei OptiXtrans DC908 Product Datasheet

Huawei DCI vs. Backbone Network Deployment Guide

TheCampus OptiX solutionis a comprehensive offering that integrates multiple components to deliver a complete Passive Optical LAN (POL) solution. The main sale products include:

OLT (Optical Line Terminal):Central device for managing the network.

ODN (Optical Distribution Network):Passive infrastructure for signal distribution.

ONU/ONT (Optical Network Unit/Terminal):Customer-side devices for connecting end-users.

eSight:Huawei's network management system (NMS) for centralized monitoring and management of the entire network.

While options like "OLT + ODN + ONU" or "OLT + ONT" represent subsets of the solution, the inclusion ofeSightis critical for effective network management and operation, making option A the most complete and accurate choice.

References:

Huawei Campus OptiX Solution Guide

eSight Product Documentation

The correct answer is38.4T. TheOptiXtrans DC908supports a maximum single-fiber capacity of38.4 Tbps, making it one of the most advanced solutions for high-capacity optical transport.

Here’s how the DC908 achieves this capacity:

WDM Technology:Combines multiple wavelengths on a single fiber, each carrying data at speeds up to400G.

Advanced Modulation:Uses modulation schemes like DP-16QAM to maximize spectral efficiency, enabling higher data rates within the same fiber spectrum.

High Density:Supports up to96 wavelengths per fiber, resulting in a total capacity of38.4 Tbps(96 x 400G).

Future-Proofing:Designed to accommodate emerging technologies like 800G wavelengths, ensuring scalability for future demands.

This level of capacity is critical for applications like data center interconnects, where large volumes of data need to be transmitted over long distances without bottlenecks.

The statement isTrue. TheOptiXtrans E9600 seriesincludes multiple models, such as theE9624,E9612, andE9605, each designed for specific use cases in optical transmission networks.

Here’s an overview of the models:

OptiXtrans E9624:A high-capacity device used in backbone and core networks, supporting large-scale traffic aggregation and long-distance transmission.

OptiXtrans E9612:A mid-range device suitable for metro and regional networks, balancing capacity and cost-effectiveness.

OptiXtrans E9605:A compact device primarily used in OLA stations for optical signal amplification.

The modular design of the E9600 series allows operators to select the appropriate model based on their network requirements, ensuring optimal performance and scalability.