WS-C4506-E=
Cisco Catalyst 4506-E Switch Chassis with PoE - Manageable - 6 x Expansion Slots - 3 Layer Supported - Rack-mountable
WS-C4506-S4AP25
Cisco Catalyst 4506-S4-AP25 Switch Chassis - 1 x Supervisor Engine, 5 x Switching Module
WS-C4506-S4AP50
Cisco Catalyst 4506-S4-AP50 Switch Chassis - 1 x Supervisor Engine, 5 x Switching Module