Cisco�s Catalyst 5500/5000 Series offers a complete set of enterprise switching solutions spanning everything from the campus backbone to the desktop. The Cisco Catalyst 5500/5000 Series of switches is based upon proven Cisco switching technology that is being used in the largest campus networks in the world.This is a Catalyst 5000 chassis with Alimentation, Supervisor II TX and 24-port Ethernet 10/100 modules.