Finisar 40BASE-SR4 100m QSFP+ Gen2 Optical Transceiver Module

The Finisar 40BASE-SR4 QSFP+ Gen2 transceiver is a high-density, high-performance solution designed for 40 Gigabit Ethernet links over multimode fiber. Built around Finisar’s proven FTL410QE2C platform, this module delivers four parallel 10 Gbps channels in a compact QSFP+ form factor, enabling scalable, cost-efficient uplinks in modern data centers and enterprise networks. With QSFP+ MSA compliance and IEEE 802.3ba 40GBASE-SR4 compatibility, it ensures broad interoperability while offering Digital Diagnostics Monitoring (DDM) through an I2C interface for real-time visibility into operating conditions. These features come together to support demanding workloads, virtualization, cloud services, and high-density switch deployments with reliable, 40G connectivity.

• 40 Gbps aggregate bandwidth through four parallel 10 Gbps channels (SR4), enabling dense, high-speed uplinks in data centers and enterprise networks.
• Multimode fiber compatibility with 100-meter reach on standard OM3/MMF installations, making it an ideal fit for inside-rack and between-rack interconnects.
• QSFP+ MSA compliance and IEEE 802.3ba 40GBASE-SR4 specification adherence for broad interoperability with a wide range of switches, switches modules, and optical engines.
• Digital diagnostics monitoring (DDM) via I2C interface, providing real-time visibility into key parameters such as optical power, temperature, and electrical characteristics to simplify troubleshooting and maintenance.
• Hot-pluggable, rugged QSFP+ module designed for data-center environments, offering reliable performance in dense fabric deployments and server edge applications.

Technical Details of Finisar 40BASE-SR4 100m QSFP+ Gen2 Optical Transceiver Module

• Form Factor: QSFP+ (Quad Small Form-factor Pluggable) module, QSFP+ MSA compliant.
• Data Rate: 40 Gbps aggregate, comprising four 10 Gbps lanes (4x10G) for 40GBASE-SR4 Ethernet.
• Optical Operating Principle: 4-channel SR4 transceiver using multimode fiber with 850 nm VCSEL emitters (SR4 architecture) to support parallel optics.
• Fiber Type and Reach: Designed for multimode fiber, with a specified reach of up to 100 meters on OM3 MMF in SR4 configurations.
• Fiber Connector: MPO/MTP 12-fiber interface suitable for SR4 parallel fiber links, enabling compact, high-density deployments.
• Standards and Compliance: QSFP+ MSA compliance and IEEE 802.3ba 40GBASE-SR4, ensuring compatibility with a broad ecosystem of 40G switches and optics.
• Diagnostics: Digital Diagnostics Monitoring (DDM) via I2C, offering real-time readouts of critical parameters to assist with monitoring and preventative maintenance.
• Manufacturer and Series: Finisar, part of the FTL410QE2C family, representing Gen2 SR4 optical transceivers designed for reliable data-center operation.
• Compatibility and Use Case: Optimized for high-density 40G uplinks, server-to-spine interconnects, and storage networks where parallel optics provide a cost-efficient solution.
• Operating Conditions: Built to operate within typical data-center environmental ranges; intended for commercial deployments requiring robust, plug-and-play functionality.

How to Install Finisar 40BASE-SR4 100m QSFP+ Gen2 Optical Transceiver Module

Installing a QSFP+ SR4 transceiver is straightforward and follows standard hot-swap procedures used in most modern data-center switches and optical devices. To ensure a smooth installation and optimal performance, follow these steps:

1) Power and readiness: If your equipment supports hot-swapping, you can install without powering down the chassis. If required by your specific hardware, power down the system before installing the module.

2) Prepare the port: Remove any dust caps from the QSFP+ port and inspect the adjacent slot for debris. A clean, unobstructed slot helps ensure proper seating and linkage.

3) Align and insert: Grasp the QSFP+ transceiver by its body (not the fiber connectors) and align it with the port. Gently push the module into the slot until it seats securely and the latch engages, indicating a successful installation.

4) Fiber connection: Attach the multimode fiber optic harness to the MPO/MTP connector on the transceiver. Ensure the connector is clean and free of dust. For SR4 links, use an MPO/MTP trunk or fan-out cables appropriate for SR4 parallel optics. Maintain proper fiber polarity and labeling to avoid misalignment in multi-slot racks.

5) Verify link integrity: Power on the equipment (if applicable) and monitor the port LEDs for link status. Use the device’s management interface to confirm an active 40G link. Take advantage of the I2C-based digital diagnostics (DDM) to check real-time optical power, temperature, and channel health as needed.

6) Post-install checks: Run basic throughput tests to verify 40 Gbps performance across all four lanes. If a problem arises, consult the DDM data to identify misalignment, fiber issues, or degraded link performance, and reseat or re-route cables as necessary.

Tips for best results: keep fiber runs clean, avoid excessive bending of MMF cables, and document the installation in your network inventory for future maintenance. The Gen2 design emphasizes reliability in high-density deployments, making it suitable for data centers that require consistent 40G performance with minimal downtime.

Frequently Asked Questions

• What is 40BASE-SR4? 40GBASE-SR4 is a 40 Gigabit Ethernet standard that uses four parallel 10 Gbps lanes to transmit data over multimode fiber. It is commonly deployed in data centers to provide high-density, short-reach uplinks between switches and other network devices.
• What kind of fiber is required? It uses multimode fiber (MMF), typically OM3 or OM4, with an MPO/MTP connector. The 100-meter specification applies to standard OM3 MMF installations.
• How many lanes does this transceiver use? The SR4 configuration uses four parallel lanes, delivering a total aggregate bandwidth of 40 Gbps (4x10 Gbps).
• Is the transceiver hot-swappable? Yes. The QSFP+ form factor is designed for hot-swapping in compatible switches and routers, allowing maintenance without powering down the entire system in most cases.
• What standards does it comply with? It is QSFP+ MSA compliant and adheres to IEEE 802.3ba for 40GBASE-SR4, ensuring interoperability with a wide range of networking equipment that supports these standards.
• Does it support digital diagnostics? Yes. The module provides Digital Diagnostics Monitoring (DDM) via an I2C interface, enabling real-time readouts of parameters like optical power and temperature for easier monitoring and proactive maintenance.
• What applications are best suited for this module? It’s ideal for data-center spine-leaf architectures, high-density 40G uplinks, server-to-switch interconnects, and storage networks where parallel optics and 100-meter MMF reach are advantageous.
• What is the typical use-case for Finisar FTL410QE2C Gen2 SR4? It’s designed to deliver reliable, high-density 40G links in enterprise data centers, cloud infrastructure, and HPC environments where fast, scalable interconnects are essential.