The EIR405-T includes a switch controller that automatically senses transmission speed (10/100/1000 Mbps). The RJ45 interface also auto-detects MDI or MDI-X, eliminating the requirement for a crossover cable. Each port is buffered and supports store-an d-forward protocol.To reduce the risk of power failure, the EIR405-T provides two 12 to 48 V DC power inputs. If the power fails, the switch will automatically use the secondary power input. Also, if the power goes out the corresponding P1 or P2 LED will go out and the Fault LED will light. The contacts for the alarm output will also open. The switch features a space saving IP30 metal enclosure that can be DIN or Panel mounted. The power line input on the EIR405-T offers protection from up to 3,00 0 V EFT. The Ethernet ports offer up to 6,000 V ESD protection.