Cisco QSFP-40G-LR4-S Module : 40Gbps Long-Range , Low Power , DDM Support

The Cisco QSFP-40G-LR4-S is a high-performance 40Gbps QSFP+ optical transceiver designed for long-distance data transmission over single-mode fiber (SMF). Ideal for data centers, enterprise networks, and telecom deployments, this module combines high speed, low power consumption, and advanced diagnostics for reliable connectivity.

Key Features & Benefits

✅ 40Gbps Ethernet Support – Compliant with IEEE 802.3ba, delivers high-bandwidth connectivity for demanding applications.
✅ 10KM Long-Range Transmission – Uses CWDM technology (4×10Gbps lanes) over single-mode fiber (SMF) for extended reach.
✅ Low Power Consumption (<3.5W) – Energy-efficient design reduces operational costs in data centers.
✅ Digital Diagnostic Monitoring (DDM) – Real-time monitoring of temperature, voltage, and optical power for proactive maintenance.
✅ Hot-Swappable & MSA-Compliant – Easy installation without downtime; works with Cisco Nexus, ASR, and third-party MSA-compatible devices.
✅ Dual LC Connector – Standard interface for seamless integration with existing fiber infrastructure.

Technical Specifications (QSFP-40G-LR4-S)

Applications

✔ Data Center Interconnects (DCI) – High-speed links between switches/routers.
✔ Enterprise Core Networks – Scalable backbone for 40G Ethernet.
✔ Telecom & Metro Networks – Long-haul fiber connectivity.

Why Choose Cisco QSFP-40G-LR4-S?

• Cisco Certified – Guaranteed compatibility and reliability.

• Future-Proof – Supports evolving 40G/100G upgrade paths.

• Cost-Effective – Lower power use vs. older 40G modules.