The switch provides 2 Gigabit SFP optic ports, 4 Fast Ethernet ports, and 4 RS232/422/485 serial ports. This switch adopts an industrial redundant ring network design, where each device has two fiber optic ports to form a ring network. The network topology is established through a cascading method. The Comnet™ CNGE8MS Managed Redundant Ring Ethernet Switch provides robust transmission of four (4) 10/100/1000BASE-T (X) and four (4) gigabit combo ports. This plug-and-play four-port switch offers connectivity and comes in a compact, durable metal case with metal DIN rail clip. Top performance for high-speed layer 2. ORing offers a comprehensive portfolio of rugged industrial Ethernet switches, from cost-effective unmanaged and PoE models to advanced Layer 2/3 managed switches enabling precise control. 4-Port Managed Industrial Gigabit Ethe.