Name: QSFP-40G-LR4-S Cisco 40GBASE-LR4 LC Single-Mode QSFP+ Transceiver 10km
Brand: Cisco
SKU: QSFP-40G-LR4-S
Price: 116.00 USD
Availability: InStock
Rating: 4.8 (119 reviews)

Product Overview
The QSFP-40G-LR4-S Cisco transceiver module converts electrical signals into optical signals for 40 Gigabit Ethernet connections over single-mode fiber. It plugs into QSFP+ ports and is designed for links up to 10 kilometers, making it suitable for extended network runs in data centers or campus networks.

General Information
Brand	Cisco
Part Number	QSFP-40G-LR4-S

Technical Information
Form Factor	QSFP+
Media	SMF
Type	4 x LAN WDM EML
Power Consumption	<=3.5 W (typical ~3.5 W)
Protocols	40GBASE-LR4, IEEE 802.3ba (40G Ethernet), MSA-compliant
Connector	LC Duplex
DOM Support	Yes

Physical Characteristics
Weight	5.00
Condition	Refurbished

Product Description
This QSFP-40G-LR4-S transceiver module enables high-speed 40Gbps data transmission over long distances using single-mode fiber. It is commonly found in enterprise and data center networks where 40G connectivity is needed between switches or routers across building or campus environments. Built for network engineers and IT professionals, this module fits into QSFP+ slots and converts electrical signals to optical for efficient data transport. It's often used to extend links beyond standard copper or short-reach modules can handle. Key Features Supports 40 Gigabit Ethernet connections at 10 km reach on single-mode fiber Uses LC duplex connectors for reliable optical interface Compliant with IEEE 802.3ba standards ensuring interoperability Low power consumption suitable for high-density installations Digital diagnostics monitoring allows real-time performance tracking Typically deployed in data centers and enterprise backbones, this transceiver helps maintain fast and stable network links. Its long-reach capability reduces the need for additional infrastructure, streamlining network design. The module plays a key role in supporting growing bandwidth demands while providing consistent performance in demanding environments.

Use Cases
The Cisco QSFP-40G-LR4-S transceiver module is typically deployed in environments requiring high-speed, long-distance data transmission over single-mode fiber. It is ideal for network architects and IT professionals managing data center interconnects, campus backbone connections, and other infrastructure demanding 40GbE throughput beyond short-range limits. How It's Used: Connecting core switches across data center pods to support virtualization and large-scale compute workloads. Extending enterprise campus backbone links where single-mode fiber runs exceed 10 kilometers. Facilitating high-bandwidth interconnects between storage clusters and compute nodes in distributed storage environments. Enabling service providers to deliver 40GbE connectivity between central offices and metro Ethernet networks. Supporting edge computing deployments that require robust, low-latency fiber connections in remote or distributed sites. This transceiver enhances network scalability by enabling efficient data transfer over extended distances, helping organizations maintain performance in complex infrastructure layouts. Its compatibility with QSFP+ ports facilitates seamless integration into existing hardware, promoting operational consistency and simplified network expansion.

QSFP-40G-LR4-S Cisco 40GBASE-LR4 LC Single-Mode QSFP+ Transceiver 10km

Product Overview

General Information

Technical Information

Physical Characteristics

Product Description

Use Cases