Name: Cisco QSFP-40G-LR4 Optical Transceiver Module (SMF, 1310nm, 10km, LC, DOM)
Brand: Cisco
SKU: QSFP-40G-LR4
Price: 234.00 USD
Availability: InStock
Rating: 4.8 (119 reviews)

Product Overview
The Cisco QSFP-40G-LR4 optical transceiver module supports 40 Gigabit Ethernet links over single-mode fiber, transmitting data up to 10 kilometers using a 1310nm wavelength. It's designed to fit QSFP+ ports and uses LC connectors, making it suitable for longer distance connections in enterprise and data center networks. The module also includes digital optical monitoring to assist with network management and operational visibility.

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

Technical Information
Form Factor	QSFP+
Media	SMF
Type	DFB CWDM
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 Cisco QSFP-40G-LR4 is designed to enable high-speed 40 Gigabit Ethernet connections over long distances. Built for single-mode fiber networks, it's a common choice for data centers and enterprise environments needing reliable, high-bandwidth links. Often found in aggregation layers or backbone networks, the module supports 10 km transmission, making it ideal for campus or metro area networks. Network engineers and IT professionals frequently deploy this transceiver to extend connectivity without compromising performance. Key Features Delivers consistent 40G data rates over single-mode fiber Uses 1310nm wavelength for optimal long-distance transmission Incorporates LC duplex connectors for standardized interfacing Equipped with digital optical monitoring to track module status Compatible with Cisco QSFP+ ports for straightforward integration This transceiver is typically installed in switches or routers where long-reach, high-speed connectivity is essential. Its support for DOM helps maintain network uptime by providing real-time diagnostics. Many organizations rely on this module for efficient data transport across large-scale network infrastructures.

Use Cases
The Cisco QSFP-40G-LR4 optical transceiver module is commonly deployed in enterprise data centers and large-scale network environments where high-bandwidth, long-distance connections are essential. It serves IT professionals managing backbone links and aggregation layers that require reliable 40 Gigabit Ethernet connectivity over single-mode fiber. How It's Used: Connecting top-of-rack switches to core routers in data centers supporting virtualization and cloud workloads. Extending high-speed links between geographically separated buildings within campus networks. Facilitating interconnects in storage area networks (SANs) where low latency and high throughput are critical. Supporting edge computing deployments that require robust 40G uplinks to centralized data centers. Linking aggregation switches in enterprise IT environments for scalable network expansion. This transceiver module enhances network performance by enabling efficient long-distance data transmission, reducing bottlenecks in critical infrastructure. Its compatibility with QSFP+ interfaces allows seamless integration into existing hardware, supporting scalable growth and operational continuity in complex network architectures.

Cisco QSFP-40G-LR4 Optical Transceiver Module (SMF, 1310nm, 10km, LC, DOM)

Product Overview

General Information

Technical Information

Physical Characteristics

Product Description

Use Cases