Description
Cisco 40GBase-LR4 QSFP Module for SMF with OTU-3 Data-Rate Support
Elevate your data-center bandwidth with Cisco’s 40GBASE QSFP module designed for SMF (single-mode fiber) networks and OTU-3 data-rate support. This compact, high-density transceiver delivers reliable 40 Gigabit Ethernet connectivity in enterprise cores, distribution layers, and service-provider backbones while maintaining energy efficiency and low footprint. Built to align with Cisco’s proven reliability and interoperability, the module fits seamlessly into Cisco switches and routers, delivering scalable performance for modern cloud, AI, and HPC workloads. With four parallel 10 Gbps lanes packed into a single QSFP package, it enables dense rack configurations, streamlined cabling, and simplified management — all while supporting OTU-3 mapping for efficient transport networks. Whether you’re stitching together campus interconnects, spine-leaf fabrics, or long-haul links, this LR4 module provides the long reach and robust optics needed to keep data moving at high speeds with exceptional precision and low latency.
- Compact, high-density design and scalable throughput: The Cisco 40GBASE-LR4 QSFP module consolidates four independent 10 Gbps transmit/receive channels into one QSFP+ form factor, delivering a total potential throughput of 40 Gbps. This enables dense rack designs, simplified patching, and easier cable management across data centers and HPC environments, while preserving investment in existing fiber infrastructure and switch ports.
- SMF reach with long-haul capabilities: Engineered specifically for single-mode fiber, this LR4 transceiver supports long-distance links up to 10 kilometers (subject to fiber type and installation conditions). It’s ideal for data-center interconnects, metro-area backbones, cross-building links, and campus deployments where fiber runs span multiple kilometers, enabling scalable, future-proof connectivity.
- OTU-3 data-rate support for carrier-grade transport: Designed to accommodate OTU-3 data-rate requirements, the module integrates smoothly with optical transport architectures and supports efficient data mapping for high-throughput services. It’s well-suited for tier-1 and tier-2 networks that demand reliable, predictable transport performance alongside 40G Ethernet.
- Ease of deployment, monitoring, and manageability: The hot-swappable design allows installation and replacement with minimal disruption to active networks on compatible Cisco platforms. Digital Diagnostics Monitoring (DDM) provides real-time visibility into critical operating parameters such as transmit power, receive power, temperature, and laser bias current, enabling proactive maintenance and faster fault isolation.
- Reliability, compatibility, and industry stewardship: Cisco’s LR4 QSFP module is engineered for consistent optical performance, thermal stability, and long-term reliability in demanding data-center, HPC, and service-provider environments. It adheres to universal QSFP specifications and is designed for interoperability with Cisco devices and a broad ecosystem of optics, helping simplify inventory and procurement while reducing risk during upgrades and expansions.
- Data rate: 40 Gbps
- Form factor: QSFP+ (Quad Small Form-Factor Pluggable)
- Media type: Single-Mode Fiber (SMF)
- Reach: Up to 10 km (distance depends on fiber quality and optical budget)
- Wavelength channels: 4 × 10 Gbps lanes (LR4); optimized for SMF with 1310/1550 nm operation
- Connector type: LC duplex
- OTU-3 data-rate support: Compatible with OTU-3 transport mappings
- Diagnostics: Digital Diagnostics Monitoring (DDM) capable
- Power consumption: Low-power design aligned with Cisco QSFP specifications
- Operating environment: Designed for standard commercial data-center temperature ranges; refer to datasheet for exact specs
- Installation: Hot-swappable with supported Cisco devices
How to install Cisco 40GBase-LR4 QSFP Module for SMF with OTU-3 Data-Rate Support
- Prepare the platform: Ensure you are using a Cisco device that supports 40GBASE-LR4 QSFP modules and verify that the firmware is up to date for optimal compatibility and feature support.
- Power and safety considerations: If your platform requires hot-swapping, follow the vendor’s hot-swapping guidelines. If you are unsure, power down the chassis according to your data-center procedures before installation to avoid unexpected behavior.
- Remove the existing module (if upgrading): Release the retention latch, carefully extract the existing transceiver from the QSFP port, and set it aside in an anti-static container.
- Install the new transceiver: Align the LR4 QSFP module with the port, slide it in straight until the retention latch locks, and confirm that the device recognizes the new module via the management interface.
- Connect the fiber and verify performance: Attach the SMF fiber pair to the LC duplex connectors, ensuring correct polarity and fiber type. Run basic link verification, view DDM data if available, and perform a throughput test to confirm link quality and stability.
- Q: Is this Cisco 40GBase-LR4 QSFP module compatible with non-Cisco equipment? A: This module is designed for Cisco platforms and is most reliably used within Cisco ecosystems. Interoperability with non-Cisco devices can vary; check vendor compatibility matrices and firmware requirements before mixing optics across brands.
- Q: What kind of fiber is required for LR4 with OTU-3 support? A: Single-Mode Fiber (SMF) with standard LC duplex connectors is recommended. Ensure proper fiber quality (e.g., low attenuation) and clean connectors to achieve maximum reach and best optical performance.
- Q: How can I monitor the transceiver’s health after installation? A: Use Digital Diagnostics Monitoring (DDM) to monitor optical power, temperature, and other critical metrics in real time. This helps you detect drift or degradation early and plan maintenance before issues impact service.
- Q: What is the typical reach for this module, and does it require any special fiber cable? A: Typical reach is up to 10 kilometers on standard SMF; the exact distance depends on fiber quality, splice loss, connector cleanliness, and overall network design. No special fiber beyond standard SMF is required.
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