Cisco is the worldwide leader in networking for the Internet. Cisco provides the broadest line of solutions for transporting data, voice and video within buildings, across campuses, or around the world. Cisco solutions ensure that networks both public and private operate with maximum performance, security, and flexibility.This memory is compatibile with Cisco Catalyst 5000/5500 Supervisor Engine IIG, and Supervisor Engine IIIG RSFC card (WS-X5550).