CISCO WS-X4991 Fan Tray Module

Product Overview
The Cisco WS-X4991 is a fan tray module designed specifically for Catalyst 4900 series switches. It helps maintain optimal airflow and cooling inside the switch chassis. Because the module is hot-swappable, you can replace it without shutting down the system. In addition, it fits seamlessly into Cisco Catalyst 4948 switches and similar models. As a result, network uptime is supported while thermal performance stays within safe limits.

Key Features

• Designed for Cisco Catalyst 4900 series chassis

• Hot-swappable fan tray module

• Ensures consistent internal cooling for high-density switch deployment

• Compact form factor suitable for rack-mounted equipment

• Helps reduce thermal risk and protect critical components

• Compatible with systems engineered for Cisco fan modules

• Facilitates faster maintenance and replacement

• Supports continuous operation in enterprise environments

• Suitable for refurbishment and spare-part inventory

Technical Specification Highlights

• Module model number: WS-X4991

• Compatible chassis: Cisco Catalyst 4948 and other 4900 series switches

• Hot-swap capability: yes

• Physical dimensions: approx. 1 RU height, standard rack width

• Typical weight: light module for easy handling

• Usage environment: enterprise network switch enclosures

• Purpose: internal cooling fan assembly

• Designed for high-density, high-throughput switch systems

• Ideal as replacement part in operational network deployments

Usage & Application
This fan tray module is ideal for data centres, telecommunications rooms and any rack environment using Cisco Catalyst 4900 series switches. Because cooling modules impact overall system reliability, using a proper fan tray helps protect the entire switch architecture. Moreover, when older switches are maintained or upgraded, having an appropriate cooling module like the WS-X4991 assures continuity. It also supports preventative maintenance programmes by allowing quick fan replacement without service interruption. As a result, it enhances network equipment lifespan and avoids thermal-related failures.

Why Choose this Product
Choose the Cisco WS-X4991 if you need a reliable cooling module for Cisco Catalyst 4900 series switches. It offers seamless fit, swap-out ease and supports continuous operation. Furthermore, its hot-swappable design enables fast servicing while the system remains running. Because thermal management is critical for high-performance network equipment, this fan tray is a practical choice for operators, system integrators and IT departments maintaining rack-mounted Cisco switches.

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