... industrial switch manufacturers, equipped with productive factory, welcome to buy and wholesale 4 ports 1000m industrial switch with management, 5 1000m tp ... and unmanaged types, is five ports Industrial Ethernet Switch, with 4 1000M RJ45 ports and 1 1000M RJ45 uplink ... protection and anti-interference ability Support to choose one side with fixed metal casing, external power design, better for heat ...