Advantech”s eAutomation Group released an Ethernet switch, the ADAM-6521ST, with four 10/100 Mbps Ethernet ports and one multi-mode ST type fiber-optic port. It supports a voltage range of +10 ~ 30 Vdc for power input, 3,000 Vdc power surge protection (EFT), and 4,000 Vdc ESD protection on the RJ-45 Ethernet ports. The temperature range for operation is from -10 C to 65 C (14 ~ 149° F). Other features include: full/half duplex flow control; integrated loop-up engine; MDI/MDI-X auto crossover; broadcast storm protection; and flexible DIN rail, panel, and stackable mounting. Also, each port has a pair of LEDs that indicate link status and transmission speed. This function informs users of any collisions, link status, power failure, and data receipts for immediate on-site diagnostics.