Unlike the Ethernet switches in your wiring closet or computer center, the switches at the edges of your network have to withstand extreme temperatures and conditions. This is where the Industrial 10-/100-Mbps Ethernet Switch from Black Box comes in. It's built to withstand extreme temperatures of -40 to 75°C. An IP30 metal housing protects against dust and dirt. Ideal for use in harsh environments, the switch is ideal for: Security/surveillance to backhaul IP camera data; Building automation and HVAC control; M2M communications with remote stations in oil/gas facilities; Communications networks for defense and military applications; Factory automation and machine control. The switch features 12 - 48 VDC redundant power, which is secured with a double protection mechanism: Power Polarity Reverse Protect and an Overload Current Resetable Fuse. The former tolerates reverse power wiring while the later protects the switch from overload currents.