IES3020-4GS-4F is a unmanaged Industrial Ethernet switch with high performance, high cost-effective , it provided 12 port 10Base-T/100Base-TX Ethernet + 4 port 100Base-FX optic fiber + 4 port 1000Base-FX SFP slot. It supports auto flow control, full/half duplex mode and MDI/MDI-X self-adaption. It built in standard industry design, all components are based on Industry grade, no fan, low consumption, can satisfied some kinds of requirements of industry field, to achieve high reliability.