Cisco 4-PACK-FET-40G 40GbE Line Extender for Fex

Overview
The Cisco 4-PACK-FET-40G is a high performance 40GbE line extender designed for use with Fabric Extenders (FEX). This compact module lets you extend Ethernet connectivity up to 40 gigabits per second across longer distances without sacrificing the low latency and reliability that Cisco networks are known for. Delivered as a four-unit pack, it provides a scalable solution for data center aggregation, campus core, and high-density server environments.

Key Features

• Supports 40GbE (40 Gigabit Ethernet) over standard fiber cabling
• Four independent ports per pack for flexible deployment
• Seamless integration with Cisco FEX architecture
• Low power consumption and heat generation
• Plug-and-play installation with no additional licensing required
• Backward compatible with existing Cisco Nexus and Catalyst platforms

Technical Specifications

• Port type: 40GbE SFP+ (LC duplex)
• Maximum reach: 10 km on single-mode fiber, 100 m on multimode fiber
• Operating temperature: 0 to 40 degrees Celsius
• Power supply: 48 V DC, 1.2 A per pack
• Dimensions: 1.0 in (height) x 2.5 in (width) x 0.5 in (depth) per unit
• Compliance: RoHS, FCC Part 15, CE

Typical Applications

• Data center spine-leaf architectures that require high bandwidth between switches and FEX devices
• Campus core networks extending high-speed links to remote buildings or edge switches
• High-performance computing clusters that need low latency, high throughput connections
• Enterprise storage area networks (SAN) that demand 40GbE transport for fast data replication
• Telecom aggregation points where multiple 40GbE streams must be consolidated

By deploying the Cisco 4-PACK-FET-40G, organizations can future-proof their network infrastructure, reduce cabling complexity, and achieve consistent performance across the entire fabric. This line extender delivers the speed and reliability required for modern digital workloads while maintaining the simplicity of Cisco's unified management tools.