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 Cisco Catalyst 5000 5-slot switch chassis with AC Power Supply. This switch chassis has five slots. Slot one is reserved for the supervisor engine, which provides switching, local and remote management, and dual uplink interfaces. Slots 2 through 5 are available for switching modules.