Manufacturer: Allen-Bradley / Rockwell AutomationAllen Bradley 1783-HMS4C4CGN Stratix 5400 Managed EtherNet Switch, 4 x 10/100/1000 Mbps Combo Ports and 4 x 10/100 Mbps Combo Ports, 2 x Power Source Connectors, 24/48V DC Power (12-60V DC Range), Layer 2 Software