Planet FGSW-4840S, (52)Port Layer2 Web Managed Desktop Rackmount Switch, (48)100Mbps RJ45 ports (2)1000Mbps Gigabit RJ45 ports (2)1000Base-X mini-GBIC SFP slots, Switch Fabric 17.6Gbps non-blocking, Switch Throughput 13Mpps, Dimension 440 x 180 x 44 mm (1U height), Includes Rackmount brackets rubber feet (GBIC SFP modules sold seperate)