The IP30 Layer-2 gigabit Ethernet switch from Belden, with high-voltage resistance, has 16 Gigabit Ethernet combination ports that will also connect SFP fiber optical transceivers. All ports support version 2 of the Precision Time Protocol as well as optionally Power over Ethernet. These switches have an operating temperature range of -40 to +70 °C, high resistance to jarring, and extensive insusceptibility to electrical discharge and magnetic fields. Their passive cooling without fans and redundant power supply ensure a high operational safety. They meet the standards of IEC 61850, IEEE 1613, EN 50121-4, EN 50155, cUL 508, cUL 1604 C1 Div2 and GL. Their rugged metal housing measures 448 by 44 by 310 mm in width, height and depth.