PoE Web Smart Switch that provides 24 10/100/1000 Base-T PoE ports with 4 Gigabit SFP ports. In addition to IEEE 802.3af compliance ports 1-4 provide up to 30 watts of power output following IEEE 802.3at. Features Power saving - D-Link Green 3.0 and IEEE 802.3ad ( Energy Efficient Ethernet).