The WS-X4992 is a dedicated fan tray for Cisco Catalyst 4900M switches, containing five high‑performance cooling fans. Designed to fit seamlessly into the switch chassis, this tray provides reliable airflow and heat dissipation, ensuring optimal operating temperatures for the device’s internal components. It is a direct replacement or upgrade component that maintains the switch’s certified performance and reliability standards. The tray’s modular construction allows for easy installation and maintenance, while the five fans collectively deliver the necessary cooling capacity for the Catalyst 4900M’s high‑density processing environment. This component is essential for sustaining system stability and extending the lifespan of the switch hardware.