The EDS-4009 Series is a range of 9-port managed Fast Ethernet switches with the option for three 100M ST/SC fiber-optic ports. Redundant Ethernet technologies such as Turbo Ring, Turbo Chain, and RSTP/STP increase the reliability of your system and improve the availability of your network backbone. The EDS-4009 Series is designed specifically for demanding applications such as video and process monitoring, ITS, and DCS systems, all of which can benefit from a scalable backbone.