Unified Management System. Redesigned GUI for voice and data. Advanced QoS / Security / Administration Features. 24 10/100/1000 Base-T (RJ-45) ports with IEEE 802.3af specification to supply power to IP phones (185w). 4 ports 10/100/1000 uplink Shared (SFP). The ability to scale switches into a stack. Programming via WEB. Indicates the status of the ports on the switch and the interface. Installation in a 19 ”rack.