JL485-61001 HPE Aruba 25G SFP28 LC eSR 400m MMF Transceiver

HPE JL485-61001 Aruba 25 Gigabit SFP28 LC Transceiver

HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver is a high-performance optical networking component engineered for next-generation data center and enterprise switching environments. Designed to deliver reliable 25 Gigabit Ethernet connectivity over multimode fiber infrastructure, this plug-in SFP28 module ensures stable signal transmission, low latency communication, and enhanced bandwidth efficiency across modern network architectures. It is optimized for environments requiring extended short-reach performance up to 400 meters, making it suitable for high-density switching fabrics and backbone interconnects.

General Information 

• Brand: HPE
• Part Number: JL485-61001
• Product Type: SFP28 Transceiver Module

Technical Specifications

• Interface Type: 1 x Ethernet 25GBASE-eSR
• Connector Type: LC duplex multimode
• Deployment Style: Plug-in optical module
• Connectivity Technology: Wired fiber optic communication
• Protocol Support: 25 Gigabit Ethernet
• Data Rate: 25 Gbps sustained transmission
• Fiber Type: Multimode fiber (MMF)

Key Functional Advantages

• High-speed 25G Ethernet support for modern network scaling
• Low latency optical transmission for performance-critical workloads
• Compact SFP28 form factor for high-density switching environments
• Reliable multimode fiber compatibility for structured cabling systems
• Extended reach capability up to 400 meters for flexible deployment

Compatibility 

Supported HPE Aruba Switch Families

• HPE Aruba 8400 Series Modular Switches
• HPE Aruba 8325 Series Data Center Switches
• HPE Aruba 8360 Series High-Performance Switches
• HPE Aruba CX Series platforms with SFP28 25G ports
• Other HPE networking devices supporting 25GBASE-eSR optics

Infrastructure Compatibility 

• Recommended fiber types: OM3 / OM4 multimode fiber
• Designed for structured data center fiber architecture
• Compatible with LC duplex patch cord systems
• Optimized for 25GbE switch-to-switch connectivity

Deployment Scenarios and Use Cases

• Data center spine-and-leaf architectures
• Cloud computing and virtualization networks
• Enterprise core and aggregation switching
• High-speed server-to-switch interconnects
• Storage area network (SAN) fiber extensions

HPE JL485-61001 Aruba 25 Gigabit SFP28 Transceiver 

The HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver represents a high-performance optical networking component designed for next-generation data center, enterprise, and cloud-scale infrastructures. Built to support 25 Gigabit Ethernet transmission rates over multimode fiber (MMF), this transceiver is engineered for extended short reach (eSR) applications where higher distances are required beyond standard short-range optical modules. With support for up to 400 meters over optimized OM4 fiber cabling, it enables flexible topologies and high-bandwidth aggregation across modern switching environments.

This transceiver is part of the Aruba optical portfolio designed to integrate seamlessly into high-density switching platforms, enabling scalable, low-latency, and energy-efficient connectivity. The LC duplex connector interface ensures standardized optical coupling, while the SFP28 form factor allows hot-swappable deployment in compatible network devices.

Advanced Optical Transceiver Architecture and Design 

The architecture of the HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver is based on precision-engineered optical-electrical conversion mechanisms. The module converts electrical signals from network switches into laser-based optical signals that travel through multimode fiber cabling. On the receiving end, the optical signals are converted back into electrical data streams with minimal latency and signal distortion.

The design emphasizes signal integrity, low jitter, and minimal bit error rates under high-throughput conditions. Advanced laser diodes, integrated photonic receivers, and adaptive power control systems contribute to consistent performance even in dense cabling environments found in modern data centers.

Thermal efficiency is also a core design consideration. The module is optimized for low power consumption, enabling deployment in high-density switch chassis without excessive heat accumulation. This ensures stable performance across varying environmental conditions.

25 Gigabit Ethernet and Role of SFP28 Technology

25 Gigabit Ethernet represents a critical transitional speed layer between 10 Gigabit and 40/100 Gigabit networking standards. The HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver is designed to support this evolution, providing higher throughput without requiring a complete overhaul of existing fiber infrastructure.

The SFP28 interface is an enhanced version of the SFP+ form factor, engineered specifically for 25G signaling rates. It offers improved signal integrity, better shielding, and higher bandwidth capacity per lane. This allows network architects to scale performance efficiently while maintaining backward compatibility in multi-speed environments.

By utilizing this transceiver, enterprises can transition workloads gradually from 10G to 25G networks, improving overall data flow efficiency in virtualization, storage networking, and cloud interconnectivity scenarios.

Extended Short Reach eSR 400m Multimode Fiber Capability

One of the defining characteristics of the HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver is its extended short reach capability. Unlike traditional short reach modules limited to 70 or 100 meters, this eSR variant supports distances up to 400 meters over optimized multimode fiber.

This extended range is achieved through optimized laser modulation techniques, improved receiver sensitivity, and enhanced error correction mechanisms. The module is particularly effective when deployed with OM4 or high-grade OM3 fiber infrastructure, where modal dispersion is minimized and signal clarity is preserved over longer distances.

The extended reach capability makes it suitable for large-scale campus environments, multi-row data centers, and distributed switching architectures where racks are separated by significant physical distances.

Data Center Network Fabric Optimization

Modern data centers rely heavily on high-bandwidth, low-latency interconnects to support cloud computing, virtualization, and containerized workloads. The HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver plays a vital role in optimizing these network fabrics by providing efficient interconnectivity between leaf and spine switches.

By enabling 25 Gigabit links across extended distances, network designers gain flexibility in rack placement and cabling strategies. This reduces the need for additional switching layers and minimizes oversubscription ratios in critical data paths.

The transceiver also contributes to improved load balancing across distributed compute clusters, ensuring that traffic is evenly distributed across available network paths.

Optical Signal Performance and Integrity Management

Signal integrity is a critical factor in high-speed optical communication. The HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver incorporates advanced modulation techniques that reduce signal degradation over multimode fiber.

The module is engineered to minimize chromatic dispersion and modal noise, which are common challenges in high-speed optical transmission. These optimizations help maintain stable bit error rates even under heavy network load conditions.

Adaptive optical power control further enhances performance by dynamically adjusting laser output based on link conditions, ensuring consistent transmission quality across varying distances and fiber qualities.

Wavelength Engineering and Optical Characteristics

The transceiver operates using a precisely defined optical wavelength optimized for multimode fiber transmission. This wavelength selection ensures efficient light propagation with minimal loss and distortion across supported distances.

The optical components are calibrated to maintain alignment with industry standards for 25G Ethernet transmission, ensuring interoperability and predictable performance in multi-vendor environments where applicable.

Receiver sensitivity and transmitter power levels are balanced to achieve optimal link budget utilization, allowing the HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver to maintain stable connectivity across extended fiber runs.

Hot Swappable Deployment

The SFP28 form factor allows the HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver to be hot-swappable, enabling installation or replacement without powering down network equipment. This capability is essential for maintaining uptime in mission-critical environments.

Network administrators can insert or remove the module as needed while systems remain operational, significantly reducing maintenance windows and minimizing service interruptions.

The LC duplex connector interface simplifies fiber attachment and ensures secure, low-loss connections that maintain signal integrity across deployment cycles.

Multimode Fiber Infrastructure

The HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver is optimized for multimode fiber environments, particularly OM3 and OM4 cabling systems. These fiber types are widely used in data centers due to their cost efficiency and ease of deployment.

OM4 fiber provides enhanced modal bandwidth compared to OM3, enabling more stable long-distance performance for 25G transmissions. Proper cable management, bend radius control, and connector cleanliness are essential factors in maintaining optimal performance.

The transceiver’s compatibility with standard LC connectors ensures that it integrates smoothly into existing structured cabling systems without requiring specialized adapters.

Cloud Infrastructure and Hyperscale Data Environments

Cloud service providers and hyperscale data centers benefit significantly from the high throughput and extended reach of the HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver. These environments demand massive east-west traffic capacity between compute nodes, storage arrays, and network aggregation layers.

By leveraging 25G connectivity, hyperscale architectures can reduce congestion, improve virtualization performance, and support large-scale distributed workloads more efficiently.

The transceiver’s reliability and consistent performance characteristics make it suitable for continuous operation in 24 by 7 cloud environments.

Lifecycle Management and Reliability

The lifecycle of the HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver is designed to align with enterprise-grade reliability standards. Each module undergoes rigorous testing to ensure consistent performance under varying environmental conditions, including temperature fluctuations and high-density operation scenarios.

Its robust construction ensures long operational lifespan, reducing the frequency of replacements and minimizing operational expenditure over time.

Lifecycle management practices in enterprise environments typically include periodic inspection, fiber cleaning, and performance monitoring to maintain optimal efficiency.

Compatibility with Aruba Switching Ecosystem

The HPE JL485-61001 Aruba 25 Gigabit SFP28 LC eSR 400m MMF Transceiver is designed for seamless integration with Aruba switching platforms that support SFP28 interfaces. It is commonly deployed in modular switches and fixed-configuration switches that require high-speed uplinks or inter-switch connectivity.

Its interoperability within Aruba networking environments ensures consistent performance, automated recognition, and simplified provisioning through network management systems. This reduces configuration complexity and enables faster deployment cycles in enterprise environments.

Compatibility extends across data center switching fabrics, leaf-spine architectures, and aggregation layers where 25G links are increasingly used to eliminate bottlenecks and improve east-west traffic performance.