StarTech.com Dell EMC QSFP-40G-LR4 Compatible QSFP+ Module – 40GBASE-LR4 SMF Transceiver

This StarTech.com QSFP-40G-LR4 compatible transceiver delivers premium 40 Gigabit Ethernet performance for data centers, enterprises, and campus networks. Engineered to be Dell EMC QSFP-40G-LR4 compatible, it guarantees seamless interoperability with Dell switches and routers while maintaining alignment with the MSA QSFP+ standard. Designed for long-haul, single-mode fiber links, this module supports 40GBASE-LR4 across SMF up to 10 kilometers, enabling high-capacity uplinks, server-to-switch connectivity, and scalable backbone networks. With built-in Digital Diagnostics Monitoring (DDM) and a robust, hot-swappable design, it provides reliable, easy-to-manage fiber connectivity that helps you optimize uptime and reduce maintenance overhead. Whether you’re upgrading an existing network or deploying new infrastructure, this transceiver is built to deliver consistent performance, compatibility, and value.

• Compatibility and interoperability: Specifically designed to be Dell EMC QSFP-40G-LR4 compatible, ensuring smooth operation with Dell EMC switches and routers that support 40GBASE-LR4. This minimizes compatibility concerns in mixed vendor environments and simplifies procurement and deployment in data centers.
• High-performance 40 GbE connectivity: Delivers four 10 Gbps lanes within a single QSFP+ package, enabling true 40 GbE uplinks and high-bandwidth interconnects between core switches, distribution layers, and high-density server racks.
• Long-reach SMF capability: Optimized for single-mode fiber, with reach up to 10 kilometers. Ideal for data center interconnects, campus backbones, and metro-area networks where distance and signal integrity are critical.
• Digital Diagnostics Monitoring (DDM): Includes DDM to monitor essential optical and electrical parameters in real time. This capability helps administrators track laser temperature, supply voltage, optical power, and other diagnostics for proactive maintenance and faster fault isolation.
• Plug-and-play, easy installation: The QSFP+ form factor is designed for hot-swapping in compatible switches and routers. Its standardized MSA interface enables quick deployment with minimal downtime, reducing maintenance windows and downtime costs.

Technical Details of StarTech.com Dell EMC QSFP-40G-LR4 Compatible QSFP+ Module

• Data rate: 40 Gb/s (40GBASE-LR4)
• Form factor: QSFP+
• Fiber type: Single-mode fiber (SMF)
• Wavelength: 1310 nm
• Reach: Up to 10 km over SMF
• Optical channels: Four lanes (4x10G) within a single QSFP+ enclosure
• Diagnostics: Digital Diagnostics Monitoring (DDM) for real-time health and performance data
• Connector considerations: Utilizes standard QSFP+ electrical interface; fiber side typically uses LC connectors for SMF, with a MPO/MTP option on certain cable assemblies depending on deployment
• Compatibility: Tested for Dell EMC QSFP-40G-LR4 compatibility and intended for use with Dell EMC switches/routers that support 40GBASE-LR4
• Power and operating conditions: Within standard QSFP+ specifications; designed for reliable operation in typical data center environments

How to install StarTech.com Dell EMC QSFP-40G-LR4 Compatible QSFP+ Module

• Prepare and safety: Power down affected devices or confirm maintenance windows, discharge static build-up by touching grounded metal, and wear an ESD strap as you handle the module.
• Verify compatibility: Ensure your Dell EMC switch or router supports 40GBASE-LR4 and that the QSFP+ port is available for hot-swapping. Confirm the device firmware is up to date to maximize compatibility.
• Inspect the transceiver: Check the package for any signs of damage, and verify the part number corresponds to the StarTech.com Dell EMC QSFP-40G-LR4 module. Do not insert damaged hardware.
• Install the module: Align the QSFP+ transceiver with the slot, insert firmly until it seats with a click, and secure any locking latches if present. Do not force the module into place.
• Connect fiber cables: Attach the single-mode fiber cables to the appropriate LC connectors (or MPO/MTP if required by your cable assembly). Ensure proper polarity and avoid bending loss by following the minimum bend radius guidelines.
• Power up and verify: Restore power to the device and check the link status. Use the device’s management interface or CLI to confirm the port is up at 40G and to monitor traffic counters.
• Enable diagnostics monitoring: If supported, enable and review DDM data to verify optical power, temperature, and voltage are within expected ranges for stable operation.
• Document the change: Record the installation details, including port, fiber type, and cable type, to simplify future maintenance and troubleshooting.

Frequently asked questions

• What networking environments is this transceiver best suited for? This module is ideal for data centers and enterprise networks requiring high-density 40 GbE uplinks, long-haul SMF connectivity, and seamless Dell EMC compatibility. It works well in core-to-distribution links, server-to-switch uplinks, and backbones where reliability and performance are critical.
• Is this a Dell EMC-specific module? No, it is a StarTech.com module designed to be Dell EMC QSFP-40G-LR4 compatible. It is tested for interoperability with Dell EMC devices while still conforming to industry-wide QSFP+ standards for broad compatibility.
• What is the maximum distance I can run this transceiver? The module supports up to 10 kilometers on single-mode fiber, depending on the fiber, the connector quality, and the network design. For longer distances, you may need additional optical amplification or regeneration depending on your network topology.
• Does it support hot-swapping? Yes. The QSFP+ form factor is designed for hot-swapping in compatible switches and routers, allowing you to replace or upgrade without powering down the network device.
• What maintenance features are available with DDM? Digital Diagnostics Monitoring provides real-time data on laser temperature, supply voltage, optical power, and other critical metrics. This enables proactive maintenance, faster fault isolation, and improved uptime.
• Will this transceiver require special cabling? Depending on your deployment, you may use standard SMF cables with LC connectors or appropriate MPO/MTP fan-out solutions for parallel fiber connectivity. Always follow the fiber type and connector guidelines recommended by your network gear and cable supplier.
• How do I verify compatibility after installation? Check the port status in your switch/router management interface, confirm 40G link status, and review interface counters for valid data throughput. If DDM is available, monitor its readings to ensure stable operation.