The correct answer isPCM (Pulse Code Modulation).PCMis a critical feature forsmart gridsbecause it enables the integration of legacy analog and digital services, which are still widely used in grid communications.

Here's why PCM is essential for smart grids:

Legacy Support:Many grid systems rely on analog signaling for SCADA, protection relays, and voice communication. PCM boards convert these analog signals into digital format for transmission over modern networks.

Reliability:PCM ensures high-quality, lossless transmission of critical data, such as fault detection and control commands.

Scalability:PCM solutions can be integrated into larger optical transport platforms, such as OTN or SDH, to support growing grid requirements.

Other options:

Transponder:Used for wavelength conversion in optical networks but does not address thespecific needs of smart grids.

SAN Service:Refers to Storage Area Networks, which are unrelated to grid communications.

ROADM (Reconfigurable Optical Add-Drop Multiplexer):Used for dynamic wavelength routing in optical networks but does not directly support grid-specific requirements.

Huawei PCM Technology White Paper

ITU-T G.703 Standards for PCM

The correct answer is1. TheOptiXtrans DC908is designed to support high-density configurations, allowing an8x200G (2x100GE)WDM system to be deployed using justone chassis.

Here's a breakdown of how this is achieved:

High Integration:The DC908 integrates multiple components, such as optical modules, amplifiers, and control units, into a single compact2U chassis. This eliminates the need for additional hardware or external devices.

Scalability:The DC908 supports up to8 wavelengths per fiber pair, each operating at200G. This means that all 8x200G channels can be accommodated within a single device.

Service Aggregation:Each 200G wavelength can carry multiple 100GE services, enablingefficient aggregation of traffic. For example, two 100GE services can be mapped onto a single 200G wavelength.

Space Efficiency:By consolidating everything into one chassis, the DC908 minimizes rack space requirements, making it ideal for data centers and edge locations where space is limited.

Other options:

2, 3, or 4 chassis:These would only be necessary for extremely large-scale deployments or if additional redundancy were required. However, for an 8x200G system, a single chassis is sufficient.

This compact design highlights the DC908's efficiency and cost-effectiveness for modern optical networks.

Huawei OptiXtrans DC908 Product Documentation

ITU-T G.698 Standards for WDM

The correct definition ofPOL (Passive Optical LAN)is that it is the application of PON (Passive Optical Network) technology in the enterprise campus environment. POL leverages the advantages of fiber optics, such as high bandwidth, long transmission distances, and low maintenance costs, to provide a converged network solution for enterprises. It replaces traditional copper-based LANinfrastructure with an all-optical network, supporting services like data, voice, and video over a single fiber.

Procurement on Line, Purchasing Online System:This is unrelated to POL and refers to online procurement systems.

Point of Load:Refers to power electronics and is unrelated to optical networks.

Port of Loading:A logistics term referring to the location where goods are loaded onto a carrier, unrelated to POL.

Huawei Campus OptiX (POL) Solution White Paper

IEEE 802.3ah Standards for PON

The correct answer isThe management capacity is less than 1000 equivalent NEs.NCE-FAN Liteis a lightweight version of Huawei's Network Cloud Engine for Fixed Access Networks (NCE-FAN), designed for small to medium-sized deployments.

Key characteristics of NCE-FAN Lite include:

Scalability:Suitable for managing up to1000 equivalent NEs (Network Elements), making it ideal for smaller networks like enterprise campuses or regional ISPs.

Cost Efficiency:Offers a simplified feature set compared to the full NCE-FAN, reducing costs for organizations with limited management needs.

Ease of Deployment:Simplifies network operations with centralized monitoring, configuration, and troubleshooting capabilities.

Options A, C, and D refer to larger-scale deployments that exceed the capacity of NCE-FAN Lite. For such scenarios, the full version of NCE-FAN or other advanced management platforms would be required.

Huawei NCE-FAN Product Documentation

Huawei Campus OptiX (POL) Solution White Paper

The correct answer is48T. TheHuawei OSN 9800series supports a maximum single-fiber capacity of48 Tbps, making it one of the most advanced optical transport platforms available.

Key factors contributing to this high capacity include:

WDM (Wavelength Division Multiplexing):Combines multiple wavelengths on a single fiber, each carrying data at speeds up to 400G or higher.

OTN (Optical Transport Network):Provides efficient framing and multiplexing, enabling high-density traffic aggregation.

Advanced Modulation Techniques:Uses techniques like QPSK (Quadrature Phase Shift Keying) and QAM (Quadrature Amplitude Modulation) to maximize spectral efficiency.

This level of capacity is critical for backbone and core networks, where large volumes of data need to be transmitted over long distances without bottlenecks.

Huawei OSN 9800 Product Documentation

ITU-T G.709 Standards for OTN