24-port 10/100/1000BASE-T Gigabit RJ45 copper. 2 x 1000BASE-X mini-GBIC/SFP slots. Complies with IEEE 802.3at High Power over Ethernet. Complies with IEEE 802.3af Power over Ethernet. Up to 24 ports of IEEE 802.3af/802.3at devices powered. Supports PoE Power up to 30.8 watts for each PoE port. Each port supports 52V DC power to PoE Powered Device. 220-watt PoE budget. Auto detects powered device (PD). Circuit protection prevents power interference between ports. Remote power feeding up to 100m.