Supporting 802.3 Ethernet, 802.u Faster Ethernet Supports POE IEEE 802.3af/at compliant Powered Device (PD) Modes: Normal switch mode/Extended mode(Port1-4:250Metres ultra-longtransmission) Ports 1~4 features POE power supply capability and can be used as Power overEthernet devices 2 UPlink ports Auto MDI/MDIX crossover for all ports Support full duplex based on IEEE802.3x and half duplex based on Backpressure Support non-blocking wire speed forwarding MAC address auto-learning & auto-aging Steel case,the total POE power budget of 58W Plug and play