Name: QSFP-40GE-LR4 Cisco 40GBASE-LR4 QSFP+ Transceiver 10km LC DOM
Brand: Cisco
SKU: QSFP-40GE-LR4
Price: 424.00 USD
Availability: InStock
Rating: 4.8 (119 reviews)

Product Overview
The QSFP-40GE-LR4 Cisco-compatible optical transceiver offers 40Gbps data transmission over single-mode fiber up to 10 kilometers. Designed for use in high-performance networks, it fits QSFP+ ports and supports key monitoring features to ensure smooth operation in demanding environments.

General Information
Brand	Cisco
Part Number	QSFP-40GE-LR4

Technical Information
Form Factor	QSFP+
Media	SMF
Type	4 x LAN WDM EML
Power Consumption	≤3.5W
Protocols	OTN OTU3, 40G Ethernet, Fiber Channel, SATA/SAS3, MSA Compliant
Connector	LC Duplex
DOM Support	Yes

Physical Characteristics
Weight	5.00
Condition	Refurbished

Product Description
This QSFP-40GE-LR4 module provides reliable 40 Gigabit Ethernet connectivity over single-mode fiber. It's often found in data centers and enterprise networks where long-distance, high-bandwidth links are necessary. Built for network engineers and IT professionals, it supports fast data transport for backbone and aggregation layers. The module fits into QSFP+ ports on compatible Cisco switches and routers. Key Features Operates at a 1310nm wavelength optimized for long-reach fiber runs Supports link distances up to 10 kilometers without additional equipment LC duplex connectors ensure easy integration with standard SMF cabling Includes Digital Optical Monitoring to track power levels and temperature Compliant with 40GBASE-LR4 IEEE standards for broad interoperability This transceiver is typically deployed in large-scale network infrastructure, connecting switches across buildings or campuses. Its robust design helps maintain stable high-speed links where distance and reliability matter most.

Use Cases
The QSFP-40GE-LR4 Cisco-compatible transceiver is suited for environments requiring reliable, high-speed 40Gbps connectivity over extended distances. Network architects and IT teams in enterprise data centers, telecom backbones, and service provider networks benefit from its compatibility with single-mode fiber and robust monitoring capabilities. How It's Used: Connecting core switches in large-scale data centers to support virtualization and cloud workloads. Extending 40G links between campus buildings in enterprise IT infrastructures. Enabling high-bandwidth aggregation in telecom metro networks for service providers. Facilitating storage area network (SAN) connectivity where low latency and distance are critical. Supporting edge computing sites that require seamless integration with central data hubs. This transceiver enhances operational efficiency by providing consistent long-distance 40Gbps links, supporting network scalability through standardized QSFP+ interfaces. Its monitoring features assist administrators in maintaining optimal link performance in demanding networking environments.

QSFP-40GE-LR4 Cisco 40GBASE-LR4 QSFP+ Transceiver 10km LC DOM

Product Overview

General Information

Technical Information

Physical Characteristics

Product Description

Use Cases