W4GPP Dell 25GBE SFP28 SR 850NM 100M MMF Duplex LC Transceiver

Dell W4GPP 25GbE SFP28 SR 850nm Transceiver Module

The Dell W4GPP is a high-performance 25 Gigabit SFP28 short-range optical transceiver designed for modern high-speed data center and enterprise networking environments. This module delivers reliable fiber connectivity for switching networks requiring fast and stable data transmission over multimode fiber.

Key Product Information

• Manufacturer: Dell
• Part Number / SKU: W4GPP
• Product Category: Optical Transceiver Module

Technical Specifications of Dell W4GPP

Optical and Networking Standards

• Ethernet Standard: 25 Gigabit Ethernet (25GbE)
• Wavelength: 850 nm
• Fiber Type: Multi-mode fiber (MMF)
• Maximum Data Rate: Up to 25 Gb/s

Interface and Connector Details

• Connector Type: LC Duplex
• Interface: SFP28 / 25GBase-SR
• Expansion Slot Compatibility: QSFP28-supported systems (via network architecture)

Performance and Reach

• Maximum Transmission Distance: Up to 100 meters
• Operating Mode: Short Range (SR)
• Use Case: High-speed switching and enterprise backbone connectivity

Physical Characteristics

• Form Factor: Duplex optical module
• Design: Compact plug-in transceiver
• Weight: Lightweight industrial design (approx. 5 units as specified)

Usage and Application Areas

Ideal Deployment Environments

• Enterprise data centers
• High-performance computing clusters
• Switching and routing infrastructures
• Cloud and virtualization platforms

Network Functions

• High-speed server-to-switch communication
• Data aggregation in switching networks
• Low-latency optical transmission links

Compliance and Standards

• RoHS compliant
• WEEE environmental standards certified

System Compatibility List

Supported Dell PowerEdge Servers

• PowerEdge C4140
• PowerEdge C6420
• PowerEdge FC640
• PowerEdge M640 / M640 VRTX
• PowerEdge R440, R540
• PowerEdge R640, R6415
• PowerEdge R740, R740xd, R740xd2
• PowerEdge R7415, R7425
• PowerEdge R840
• PowerEdge R940, R940xa
• PowerEdge T440, T640

Supported PowerSwitch Models

• PowerSwitch N2200-ON
• PowerSwitch N3200-ON
• PowerSwitch S5212F-ON
• PowerSwitch S5224F-ON
• PowerSwitch S5232F-ON
• PowerSwitch S5248F-ON
• PowerSwitch S5296F-ON

Benefits of Using Dell W4GPP Transceiver

High-Speed Data Transfer

• Supports ultra-fast 25GbE networking performance
• Ensures stable and efficient data communication

Reliable Fiber Connectivity

• Optimized for multimode fiber infrastructure
• Low signal loss over short-range distances

Scalable Network Integration

• Easily integrates into existing Dell networking environments
• Ideal for enterprise scalability and expansion

Dell W4GPP 25GbE 100M MMF Duplex LC Pluggable Transceiver

High-Performance 25 Gigabit Ethernet Optical Connectivity Solution

The Dell W4GPP 25GbE SFP28 SR 850nm 100M MMF Duplex LC Pluggable Transceiver Module represents a high-speed optical networking component designed for next-generation data center environments, enterprise switching infrastructures, and high-density server interconnects. Built on the SFP28 form factor, this module delivers reliable 25 Gigabit Ethernet (25GbE) performance over multimode fiber (MMF), ensuring low-latency data transmission, efficient bandwidth utilization, and optimized scalability for modern IT workloads.

Engineered for short-reach optical communication, the SR (Short Range) variant operates at an 850nm wavelength and supports transmission distances up to 100 meters over OM4 multimode fiber. This makes it an ideal choice for intra-rack and inter-rack connections within high-performance computing (HPC) clusters, cloud data centers, virtualization environments, and storage area networks (SANs).

Core Architecture and Design Characteristics

SFP28 Form Factor Advantages

The SFP28 (Small Form-Factor Pluggable 28) interface is a compact, hot-pluggable transceiver standard designed specifically for 25GbE applications. Compared to its predecessor SFP+ (10GbE), SFP28 offers three times the bandwidth while maintaining backward compatibility in certain networking hardware configurations. The Dell W4GPP module leverages this architecture to enable seamless integration into compatible Dell networking switches and servers.

850nm Short Range Optical Transmission

Operating at an 850nm wavelength, the module uses vertical-cavity surface-emitting laser (VCSEL) technology to transmit optical signals over multimode fiber. This wavelength is optimized for short-distance, high-speed data transfer, minimizing signal attenuation while maintaining energy efficiency. The result is a stable and cost-effective solution for dense network topologies where fiber runs are relatively short.

Duplex LC Connector Interface

The duplex LC connector interface ensures secure and reliable optical connections between transceivers and fiber cabling. The LC interface is widely adopted in enterprise and data center environments due to its compact size, low insertion loss, and high precision alignment. The duplex configuration supports simultaneous bidirectional communication, which is essential for full-duplex 25GbE networking.

Performance Capabilities and Data Transmission Efficiency

25Gbps Line Rate Performance

The Dell W4GPP module supports a 25Gbps line rate per channel, delivering high-speed data transmission suitable for modern bandwidth-intensive applications. This performance is essential for cloud computing platforms, virtualization clusters, and large-scale data processing systems where network bottlenecks can significantly impact application performance.

Low Latency and High Throughput Optimization

Designed for minimal latency, the module ensures near-instantaneous data transfer between connected devices. This is particularly beneficial in environments such as financial trading systems, real-time analytics platforms, and distributed computing infrastructures where microsecond-level latency differences can affect outcomes.

Efficient Signal Encoding and Error Reduction

Advanced signal encoding techniques are employed to minimize transmission errors and improve data integrity across multimode fiber links. The transceiver incorporates forward error correction (FEC) compatibility, ensuring stable performance even in high-interference network environments.

Compatibility and Integration in Enterprise Networks

Dell Networking Ecosystem Compatibility

The W4GPP module is specifically engineered for compatibility with Dell networking hardware, including select Dell EMC switches and server NICs supporting SFP28 interfaces. This ensures seamless plug-and-play deployment without requiring extensive configuration or firmware modifications.

Switch and Server Deployment Scenarios

Typical deployment environments include top-of-rack (ToR) switches, leaf-spine data center architectures, and high-performance server clusters. The module is widely used in environments where scalability and predictable performance are critical design requirements.

Backward and Forward Network Interoperability

While primarily designed for 25GbE networks, the module can operate within mixed-speed environments, allowing gradual network upgrades from 10GbE to 25GbE infrastructures. This flexibility reduces capital expenditure and enables phased modernization strategies for enterprise IT departments.

Fiber Optic Requirements and Cabling Infrastructure

Multimode Fiber (MMF) Optimization

The Dell W4GPP module is optimized for multimode fiber infrastructure, particularly OM3 and OM4 fiber types. These fiber grades provide sufficient bandwidth and modal dispersion control to support 25Gbps transmission over distances up to 70 meters (OM3) and 100 meters (OM4).

Distance and Signal Integrity Considerations

With a maximum reach of 100 meters over OM4 fiber, the module is well-suited for data center rack-to-rack connectivity. Signal integrity is maintained through precise optical alignment and controlled dispersion characteristics inherent in multimode fiber systems.

Duplex Cabling Architecture

The duplex fiber configuration ensures separate transmission and reception paths, reducing signal interference and enabling full-duplex communication. Proper cable management and structured cabling design are essential to maintain optimal performance in high-density deployments.

Energy Efficiency and Thermal Management

Low Power Consumption Design

One of the key advantages of the Dell W4GPP transceiver is its low power consumption profile. Designed for high-density environments, it minimizes heat generation while maintaining high throughput performance. This contributes to reduced operational costs and improved overall data center energy efficiency.

Thermal Stability in High-Density Environments

In modern data centers where equipment density is high, thermal management is critical. The module is engineered to maintain stable operation across varying temperature ranges, ensuring consistent performance even under heavy network loads.

Hot-Pluggable Functionality

The hot-pluggable nature of the SFP28 module allows administrators to install or replace transceivers without powering down network equipment. This feature significantly improves system uptime and simplifies maintenance operations in mission-critical environments.

Use Cases and Application Scenarios

Data Center Networking

The Dell W4GPP module is widely deployed in modern hyperscale and enterprise data centers. It supports leaf-spine architectures where high-bandwidth, low-latency connections are required between aggregation and access layers.

Cloud Computing Infrastructure

Cloud service providers rely on 25GbE connectivity to handle large volumes of virtual machine traffic, container orchestration workloads, and distributed storage systems. The module ensures consistent performance across dynamically scaling environments.

High-Performance Computing (HPC)

In HPC clusters, inter-node communication speed is critical. The SFP28 SR module provides the necessary bandwidth for scientific simulations, AI model training, and complex computational workloads that demand rapid data exchange.

AI and Machine Learning Workloads

Artificial intelligence and machine learning frameworks require high-speed data pipelines to process large datasets efficiently. The Dell W4GPP module supports these workloads by enabling fast synchronization between compute nodes and storage arrays.

Storage Area Networks (SAN)

The module is also used in SAN environments where high-speed access to shared storage resources is essential. It ensures low-latency communication between storage controllers and servers, improving data availability and system responsiveness.