StarTech.com HPE JG661A Compatible QSFP+ Module - 40GBASE-LR4 - 40GbE Single Mode Fiber Optic Transceiver 10km

Power your data center backbone with a reliable, high-performance 40GBASE-LR4 QSFP+ transceiver that's engineered for seamless compatibility and easy integration. The StarTech.com HPE JG661A Compatible QSFP+ Module delivers 40 Gbps of multi-lane Ethernet over single-mode fiber, reaching up to 10 kilometers, and is designed to emulate the exact form factor and behavior of the HPE JG661A module. This makes it an excellent choice for upgrading or refreshing 40GbE networks while maintaining vendor flexibility and cost efficiency. Built for data center reliability, this transceiver combines robust optical performance with straightforward plug-and-play installation, so you can deploy it with confidence in a wide range of 40GbE environments.

• High-performance 40GBASE-LR4 connectivity: Four 10G lanes combined to deliver up to 40Gbps over single-mode fiber, ideal for core-to-core uplinks, data center backbones, and high-bandwidth server-to-switch connections. LR4 optics are optimized for long-reach deployments with strong dispersion tolerance on SMF.
• HPE JG661A compatibility: Specifically engineered to align with HPE hardware expectations, enabling seamless replacement, upgrade, or merge with existing JG661A-equivalent deployments while preserving link reliability and performance.
• Single-mode fiber, long reach up to 10 km: Designed to maximize performance on single-mode fiber networks, enabling reliable, cost-effective long-distance links without sacrificing signal integrity or bandwidth.
• Digital diagnostics monitoring (DDM/DOM) support: Built-in remote monitoring of essential transceiver parameters such as temperature, supply voltage, optical transmit power, and received power for proactive maintenance and quick fault isolation.
• MSA-compliant, plug-and-play design: adheres to industry standards for easy installation, hot-swapping, and broad compatibility with a wide range of switches, routers, and fiber infrastructure across data centers and enterprise networks.

Technical Details of StarTech.com HPE JG661A Compatible QSFP+ Module

• Product type: QSFP+ transceiver module
• Optical standard: 40GBASE-LR4, single-mode fiber
• Data rate: Up to 40 Gbps aggregated across four 10G lanes
• Reach: Up to 10 kilometers on SMF
• Wavelength: 1310 nm (LR4 channel set)
• Fiber type: Single-mode fiber
• Interface: QSFP+ hot-swappable transceiver; fiber connectors commonly configured per deployment (consult switch/fiber cabinet labeling and vendor guidelines)
• Diagnostics: Digital Diagnostics Monitoring (DDM/DOM) enabled for real-time health data
• Compatibility: Designed to be compatible with HPE JG661A deployments; suitable as a replacement or upgrade in QSFP+ 40GbE environments
• Power and environmental considerations: Built for standard data-center operating conditions; adheres to industry-wide interop requirements for reliability

How to install StarTech.com HPE JG661A Compatible QSFP+ Module

• Power down and unplug the equipment, then locate an available QSFP+ slot on your switch, router, or server line card.
• If you are replacing an existing module, gently release the current transceiver from the slot and remove it before proceeding.
• Align the StarTech.com QSFP+ module with the slot and slide it in until the module clicks into place and is firmly seated. Do not force the module; ensure the latches secure it.
• Connect the single-mode fiber cables to the transceiver’s fiber interface according to your network design. Ensure correct TX/RX orientation and label guidance; use proper ferrules and cleaning practices for best optical performance.
• Power up the device, monitor link status on the device console, and verify the 40GbE link shows as active. Use your network management tools to confirm throughput, latency, and duplex settings, and review DOM data if available to validate optical health.

Frequently asked questions

• What is the main purpose of this module? It is a 40GBASE-LR4 QSFP+ transceiver designed to deliver 40 Gbps Ethernet over single-mode fiber for long-reach connections, compatible with HPE JG661A deployments.
• Is this an OEM StarTech product? This module is marketed as StarTech.com compatible with HPE JG661A form-factor replacements. It is designed to work in environments that support QSFP+ LR4, and is intended as a compatible upgrade option.
• What is the maximum reach? Up to 10 kilometers on single-mode fiber, making it suitable for data center backbones and campus networks requiring long-haul connectivity.
• Does it support diagnostics? Yes. It includes Digital Diagnostics Monitoring (DDM/DOM) to monitor key parameters such as temperature and optical power for proactive maintenance.
• Do I need special drivers? No extra drivers are typically required. This is a transceiver module that interoperates with standard 40GbE ports; operations are largely plug-and-play within compatible hardware.