... Switch, Redundant Ring,Design for industrial Level 4 standard. 3ONEDATA 8-port Web Managed ... Switch, which support4 10/100M Ethernet ports(RJ45), 4 100M fiber ports, double power supply ... optional.Ethernet port:10Base-T/100Base-TX,RJ45, auto flow control, full/half duplex ... 4-2 (ESD),Level 4 EN61000-4-3 (RS),Level 3 EN61000-4-4 (EFT),Level 4 EN61000-4-5 (Surge),Level 4 EN61000-4-6 (CS),Level 4 EN61000-4 ...