From EtherWAN, this is a DIN-rail mounted Hardened Managed 12-Port 10/100/1000BASE-T(X) + 4-Port 100/1000BASE SFP Ethernet Switch designed to provide flexibility, speed, and reliability to support networks for urban infrastructure, transportation, security, power substations, and other areas where connectivity is crucial. The operating temperature range is -40 to 167°F. The processing types are store-and-forward, auto-negotiation, half-duplex back-pressure and full-duplex flow control, and auto MDI/MDIX. The switch features reverse polarity and overload current protection.