StarTech.com Dell EMC QSFP-40G-ESR4 Compatible QSFP+ Module - 40GBASE-SR4 MMF Transceiver

The StarTech.com Dell EMC QSFP-40G-ESR4 Compatible QSFP+ Module is engineered to elevate your network with exceptional speed, reliability, and flexibility. Designed for high‑density data center and enterprise deployments, this 40GBASE-SR4 optic transceiver delivers robust performance across multimode fiber, enabling scalable uplinks, server-to-switch connections, and backbone links. Built to match Dell EMC QSFP-40G-ESR4 specifications while offering the convenience of an independent, compatible module, it blends seamless interoperability with cost‑effective versatility. Expect consistent link quality, simplified maintenance, and real‑time visibility into module health thanks to Digital Diagnostics Monitoring (DDM). Whether you’re upgrading an existing fabric or deploying a brand‑new 40G network, this QSFP+ transceiver is engineered to meet modern data center demands while supporting future-proof, multi‑vendor integration.

• High‑speed 40GBASE-SR4 performance in a rugged QSFP+ form factor: This module uses four parallel 10 Gbps lanes to deliver up to 40 Gbps of raw data rate, enabling dense uplinks and switch-to-switch aggregation. Its SR4 design is ideal for short‑reach, intra‑rack and intra‑building links, reducing server bottlenecks and expanding the capacity of your data fabric. Compatibility with standard QSFP+ interfaces ensures straightforward integration into existing 40 Gigabit Ethernet networks without complex reconfigurations.
• Multimode fiber (MMF) compatibility for practical data center layouts: Built for 850 nm VCSEL transmission, the module is optimized for multimode fiber networks commonly deployed inside data centers. It supports high‑volume traffic with reliable mode coupling, reduced insertion loss, and strong resilience in fast‑moving, densely populated racks. When paired with OM4 fiber, it can reach meaningful distances—up to 400 meters in typical OM4 constructions—making it suitable for mid‑to‑high density deployments where fiber runs span multiple racks or rooms.
• Dell EMC QSFP‑40G‑ESR4 compatibility with vendor‑neutral flexibility: While designed to align with Dell EMC QSFP-40G-ESR4 interfaces, this StarTech module also integrates well in mixed‑vendor environments. It enables network refreshes, capacity upgrades, and interoperability across a diverse fleet of switches and routers that support QSFP+ 40GBASE‑SR4 optics. This flexibility helps optimize procurement, simplify inventory, and avoid vendor lock‑in, all while maintaining reliable performance and harmonious operation with Dell EMC‑related ecosystems.
• Digital Diagnostics Monitoring (DDM) for proactive health and performance management: The module includes DDM to provide real‑time, device‑level telemetry. Monitor critical parameters such as laser bias current, transmit and receive optical power, temperature, supply voltage, and overall health. DDM data empowers proactive maintenance, rapid fault isolation, and informed capacity planning, reducing downtime and extending the life of your networking gear.
• Easy installation, hot‑swappable, and plug‑and‑play in supported hardware: The QSFP+ transceiver is designed for straightforward, low‑downtime upgrades. Its hot‑swappable design allows you to replace or upgrade modules without powering down equipment (subject to your platform’s guidelines). In practice, you can simply insert the module into an available QSFP+ port, connect the MMF fiber, and verify link status through your switch or router management interface, enabling rapid deployment and minimal interruption to operations.

Technical Details of StarTech.com Dell EMC QSFP-40G-ESR4 Compatible QSFP+ Module

• Form Factor: QSFP+
• Data Rate: 40 Gbps (40GBASE-SR4)
• Fiber Type: Multimode Fiber (MMF)
• Wavelength: 850 nm (SR4 transceiver)
• Reach: Up to 400 meters on OM4 MMF (typical; actual distance depends on fiber and installation conditions)
• Diagnostics: Digital Diagnostics Monitoring (DDM)
• Compatibility: Dell EMC QSFP-40G-ESR4 hosts and other QSFP+ 40GBASE-SR4 devices
• Security & Compliance: RoHS compliant; MSA compliant
• Power & Thermal: Hot‑plug capable and designed for standard data‑center thermal environments

How to install StarTech.com Dell EMC QSFP-40G-ESR4 Compatible QSFP+ Module

To ensure optimal performance and a smooth installation, follow these practical steps. Before you begin, confirm that your switch or router supports QSFP+ 40GBASE-SR4 optics and that you have the correct MMF fiber type and connectors ready for use. Plan for a maintenance window if you are working in a production environment to minimize potential disruptions.

• Power down the device if your environment requires it, or verify hot‑swap capability with your vendor’s guidelines. Although the module is designed for hot swapping in many platforms, always follow your hardware administrator’s procedures to safeguard the equipment.
• Remove the existing module (if replacing) carefully, holding the module by its edges to avoid touching the optical surfaces. Inspect the slot for cleanliness and debris before seating the new transceiver.
• Insert the StarTech QSFP+ module into an available QSFP+ port until it seats firmly with a click. Do not apply excessive force; if a click is not felt, re-seat the module to ensure proper engagement with the connector pins.
• Connect the multimode fiber cable to the transceiver’s LC connectors, ensuring compatibility with OM3/OM4 fiber and correct polarity. Use clean, well‑terminated fiber assemblies and protect the fiber ends when not in use to prevent defects that could impact signal integrity.
• Power on the device (if applicable) and verify that the port detects the transceiver and negotiates the expected 40 Gbps link. Use your switch’s management interface or CLI to confirm link status, speed, and duplex settings, then perform a basic link test to validate end‑to‑end connectivity.
• Utilize Digital Diagnostics Monitoring (DDM) readings from the management interface to monitor temperature, voltage, bias, and optical power. Regularly review these metrics to identify potential performance degradation or environmental issues that may affect link reliability.

Frequently asked questions

• Q: What does 40GBASE-SR4 mean for my network and fiber setup? A: 40GBASE-SR4 is a short‑reach, four‑lane 40 Gbps interface designed for multimode fiber. It uses four parallel 10 Gbps channels over MMF, typically terminated with LC connectors, and is commonly deployed for data center intra‑rack or intra‑building communications over OM3/OM4 fiber.
• Q: Is this StarTech module compatible with Dell EMC QSFP‑40G‑ESR4 ports?
• A: Yes. The module is engineered to be compatible with Dell EMC QSFP‑40G‑ESR4 interfaces, offering a vendor‑neutral option that preserves performance while enabling flexible procurement.
• Q: What fiber type and reach can I expect with SR4?
• A: SR4 operates over multimode fiber. Reach is typically up to 400 meters on OM4, influenced by fiber quality, connectors, and system losses. For shorter runs on OM3/OM4, you may see longer actual link budgets depending on the installation.
• Q: Does the module support Digital Diagnostics Monitoring (DDM)?
• A: Yes. DDM provides real‑time telemetry for critical parameters like temperature, voltage, bias current, and optical power, helping you monitor health and performance proactively.
• Q: Is installation hot‑swappable?
• A: In most Dell EMC and StarTech compatible devices, QSFP+ modules are hot‑swappable, enabling module swaps without powering down the entire system. Always follow your hardware vendor’s guidelines when performing hot swaps.
• Q: Will this module work with non‑Dell EMC equipment?
• A: While designed for Dell EMC QSFP‑40G‑ESR4 compatibility, the transceiver is generally compatible with other 40GBASE‑SR4 capable devices that support QSFP+ SFP+ style transceivers, provided the host is within the 40G‑SR4 ecosystem and adheres to MSA standards.