Additional info IFS NS3550-2T-8S is a 8 port industrial gigabit managed switch with eight 10/100/1000Mbps RJ45 ports with PoE+ (30w) capabilities and two 100/1000Mbps SFP (?ber) uplink ports. IFS ...

Network switches come in two different flavors: managed ... the switch. A few resistors and some quick code allowed him to control VLAN and other functions on the switch via the USB port.