Cisco Compatible QSFP-40G-LR4-S - Functionally Identical 40GBASE-LR4 QSFP+ 1270/1290/1310/1330nm 10km DOM SMF Duplex LC

Engineered for seamless integration in modern data centers, the Cisco Compatible QSFP-40G-LR4-S is a functionally identical 40GBASE-LR4 QSFP+ transceiver designed to deliver reliable, high-performance uplinks across long-distance links. This module is a drop-in replacement that mirrors Cisco’s own QSFP-40G-LR4-S in form, fit, and function, enabling effortless migration from 10G to 40G without the risk of incompatibility. Each unit is programmed, tested and NAND-supported in the USA, ensuring you get a module that performs as expected in production networks. With a lifetime warranty, you can upgrade your data center with confidence, knowing you have a long-term, cost-effective solution that maintains Cisco interoperability, excellent return on investment, and industry-leading reliability. This transceiver supports the four 10G lanes of a single QSFP+ package, delivering consolidated bandwidth while preserving the simplicity of QSFP+ hot-swapping in conventional Cisco switches and routers. The part is ideal for spine-leaf architectures, server aggregation, and high-density top-of-rack deployments where space, power, and cable management are at a premium. The 1270/1290/1310/1330 nm wavelengths enable optimized performance over single-mode fiber (SMF) with a standard duplex LC connector, enabling robust, long-reach links up to 10 kilometers. In short, this module combines Cisco compatibility, robust testing, and a durable warranty to deliver a dependable 40G solution for data centers and enterprise networks alike.

• High-density 40GBASE-LR4 QSFP+ transceiver that aggregates four 10G lanes into a single 40G link, designed for data centers seeking maximum uplink bandwidth without sacrificing rack space.
• Wavelengths 1270/1290/1310/1330 nm achieve reliable long-haul transmission over SMF, supporting up to 10 km of link distance with minimal dispersion penalties and robust performance in varying network topologies.
• DOM support provides real-time monitoring of optical parameters (Tx power, Rx power, temperature, and other critical metrics), enabling proactive maintenance, quick fault isolation, and improved service assurance.
• Cisco compatibility guaranteed: functionally identical to Cisco’s QSFP-40G-LR4-S, extensively tested with Cisco equipment, and backed by a lifetime warranty for peace of mind in production environments.
• Reliability and ease of deployment: hot-swappable QSFP+ module built for enterprise grade networks, optimized for Cisco devices, with standardized MSA compliance to ensure interoperability across leading switches and routers.

Technical Details of Cisco Compatible QSFP-40G-LR4-S

• Form Factor: QSFP+ (Quad Small Form-factor Pluggable Plus)
• Data Rate: 40 Gbps aggregated across four 10G lanes
• Wavelengths: 1270 nm, 1290 nm, 1310 nm, 1330 nm
• Reach: Up to 10 km on SMF duplex LC
• Fiber Type: Single-Mode Fiber (SMF)
• Fiber Connector: Duplex LC
• DOM: Yes (Digital Optical Monitoring)
• Interface: Standard QSFP+ hot-swappable module compliant with Multi-Source Agreement (MSA)
• Operating Temperature: 0°C to 70°C (typical); -40°C to 85°C storage
• Power Considerations: Typical QSFP+ power envelope; depends on host platform and operating conditions
• Compliance: RoHS compliant; tested for interoperability with Cisco hardware and common OS versions
• Warranty: Lifetime warranty
• Compatibility: Cisco-compatible, functionally identical to the official QSFP-40G-LR4-S

how to install Cisco Compatible QSFP-40G-LR4-S

• Prepare the host device by locating an available QSFP+ port and ensuring the system is powered off or that hot-swapping is supported by your hardware.
• Hold the module by its edges and align it with the QSFP+ port, then insert firmly until the latch engages and the module rests flush in the slot.
• Connect the SMF duplex LC fiber pair to the module’s LC connectors, respecting polarity and ensuring the fiber is terminated with appropriate connectors and clean, undamaged fiber ends.
• Power on the device (if applicable) and verify the port status on the switch or router. Look for the 40G link light and ensure no fault indicators are active.
• Use network management tools to confirm a stable 40G link, review DOM data for TX/RX power, temperature, and other parameters, and perform any vendor-specific diagnostics to complete the deployment.

Frequently asked questions

• Is this module compatible with Cisco devices? Yes. It is designed to be functionally identical to Cisco’s QSFP-40G-LR4-S and is tested for interoperability with Cisco switches and routers, offering a cost-effective alternative with the same performance characteristics.
• What is the maximum transmission distance? Up to 10 kilometers on standard single-mode fiber, making it suitable for data-center to campus links and core-to-distribution layer connections.
• Does it support DOM? Yes. Digital Optical Monitoring is supported to monitor optical power levels, temperature, and other critical parameters for proactive health checks.
• Does the module come with a warranty? Yes. It includes a lifetime warranty, providing ongoing assurance and support for enterprise deployments.
• How should it be installed? The module is hot-swappable and designed for easy installation into QSFP+ ports. Follow standard safety and vendor-specific procedures for handling fiber and hardware.