20+4 port PoE Gigabit Ethernet Layer3 switch with 24x 10/100/1000 Mbps RJ45 ports, of which 4x 10/100/1000 Mbps combo ports RJ45/(dual speed) SFP to accommodate a standard mini-GBIC, PoE according to 802.3 at and 802.3af standard, PoE budget up to 770W, SFP DDM support, Layer 3 Unicast/Multicast Routing for IPv4/IPv6, 802.1Q VLAN, QoS, IGMP Snooping, 802.3ad Trunking, Management via SNMP, Console, Telnet and Web, Alarm relay, extended temperature range -30°C to +60°C, redundant DC power supply +40 to +72 VDC (without PoE), +45 to +57 VDC (with PoE), incl. 19' mounting kit