Complies with the IEEE 802.3, IEEE 802.3u and IEEE 802.3ab Ethernet standard. 48-port RJ45: 24-port 10/100/1000Mbps “Data input”, 24-port 10/100/1000Mbps “Data + Power output”. One 10/100/1000BASE-T management port. Complies with IEEE 802.3at and IEEE 802.3af Power over Ethernet mid-span PSE. Up to 24 IEEE 802.3at/802.3af devices powered. 440-watt PoE budget. Supports PoE power up to 30.8 watts (802.3at PoE)/15.4 watts (802.3af PoE) for each PoE port. Automatically detects powered device (PD). Circuit protection prevents power interference between ports. Remote power feeding up to 100m.