Cisco QSFP-40GE-LR4 network transceiver module Fiber optic 40000 Mbit/s QSFP+ 1310 nm
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QSFP-40GE-LR4
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overview
specifications
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QSFP-40GE-LR4 Overview
CISCO - Qsfp+ Transceiver Module - Lc Single Mode (QSFP-40GE-LR4).
Summary Description
Cisco QSFP-40GE-LR4. SFP transceiver type: Fiber optic, Maximum data transfer rate: 40000 Mbit/s, Interface type: QSFP+. Certification: MSA
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Specifications
Overview
| Condition | Refurbished |
|---|---|
| Brand | Cisco |
| Stock | In Stock |
Performance
| SFP transceiver type | Fiber optic |
|---|---|
| Maximum data transfer rate | 40000 Mbit/s |
| Interface type | QSFP+ |
| Single-mode fiber (SMF) supported | Yes |
| Fiber optic connector | LC |
| SFP transceiver standard | LR |
| Maximum transfer distance | 10000 m |
| Wavelength | 1310 nm |
| Cabling technology | 40GBASE-LR4 |
| Auto MDI/MDI-X | Yes |
Features
| Certification | MSA |
|---|
Operational conditions
| Operating temperature (T-T) | 0 - 70 °C |
|---|---|
| Storage temperature (T-T) | -40 - 85 °C |
| Operating relative humidity (H-H) | 10 - 80% |
| Storage relative humidity (H-H) | 10 - 85% |
Frequently Asked Questions (FAQs)
What is the maximum transmission distance supported by the Cisco QSFP-40GE-LR4? +
The Cisco QSFP-40GE-LR4 module is designed for long-reach connectivity over single-mode fiber (SMF). It supports link lengths of up to 10 kilometers, making it an ideal solution for interconnecting data centers, enterprise campus backbones, or metropolitan area network segments where high-bandwidth, long-distance performance is required.
Does the QSFP-40GE-LR4 require specific fiber cabling to operate correctly? +
Yes, this transceiver is built for single-mode fiber infrastructure using LC duplex connectors. It utilizes WDM technology to multiplex four transmit and receive channels, providing 40Gbps throughput. Ensure your facility infrastructure uses OS1 or OS2 single-mode cabling to maintain signal integrity and meet the 10-kilometer distance specifications established for this hardware.
Is the QSFP-40GE-LR4 compatible with all Cisco 40G-enabled switches? +
This module is compatible with a wide range of Cisco platforms, including the Nexus and Catalyst series switches that feature QSFP+ ports. To ensure optimal performance and avoid link errors, always verify that your specific switch model and software version support the LR4 standard. Consult your hardware data sheet to confirm the port compatibility and required power budget for this transceiver.
Can I use the QSFP-40GE-LR4 to connect directly to a 10G SFP+ port? +
The QSFP-40GE-LR4 operates natively at 40Gbps speeds. It cannot be directly connected to a 10G SFP+ port, as the physical interfaces and signaling rates are fundamentally different. This module is intended for high-density 40GbE uplink or aggregation applications, serving as a high-speed backbone connection rather than a branch-off link for 10G client devices.
What management features are available for monitoring this transceiver? +
This transceiver supports Digital Optical Monitoring (DOM), also commonly referred to as Digital Diagnostic Monitoring (DDM). Through your switch’s Command Line Interface (CLI), you can monitor real-time parameters such as optical input/output power, laser temperature, and transceiver supply voltage. These diagnostics are essential for proactively troubleshooting link health and maintaining high network availability in mission-critical environments.
How does the power consumption of this module impact switch heat dissipation? +
The QSFP-40GE-LR4 is engineered for efficient power usage within standard QSFP+ power envelopes. While it is highly reliable, it does generate heat during standard operation. To maintain longevity and prevent performance throttling, ensure your switch chassis has adequate airflow and is installed in a temperature-controlled environment consistent with your data center's thermal management requirements.
Is the QSFP-40GE-LR4 suitable for high-density backbone uplinks? +
Absolutely. This transceiver is specifically engineered for high-bandwidth backbone requirements, providing a cost-effective way to extend 40GbE connections across your facility. Its ability to handle 10km distances makes it a workhorse for enterprise core-to-distribution and data center inter-rack connectivity, ensuring low latency and consistent throughput for high-traffic environments.
How do I ensure the QSFP-40GE-LR4 remains reliable in a 24/7 network? +
To ensure maximum reliability, keep the optical connectors clean using industry-standard fiber cleaning kits. Dust contamination is the leading cause of signal degradation in high-speed optics. Furthermore, periodically check the DOM metrics for signal fluctuations, which act as an early warning system, allowing you to address potential fiber faults before they lead to an unplanned service outage.
How can I obtain a bulk quote for multiple QSFP-40GE-LR4 units? +
For organizations planning large-scale deployments or infrastructure upgrades, BuyRouterSwitch.com provides dedicated procurement assistance. Simply add the required quantity of QSFP-40GE-LR4 modules to your cart or contact our sales team directly to discuss bulk pricing tiers. We streamline the ordering process for enterprise clients, ensuring you receive competitive rates for high-volume network hardware acquisitions.
Why should I purchase my Cisco transceivers through BuyRouterSwitch.com? +
We prioritize supply chain integrity and professional service. Buying from BuyRouterSwitch.com ensures you receive authentic, high-quality hardware designed to integrate seamlessly into your existing Cisco ecosystem. Our streamlined purchasing process is optimized for networking professionals who need reliable components delivered quickly, backed by a team that understands the technical demands of modern enterprise IT infrastructure.
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