The ComNet CNGE4TX4US/M Ethernet 4 port unmanaged switches are designed to transmit and receive 10/100/1000 Mbps Ethernet data. The CNGE4TX4US/M are environmentally hardened to operate in demanding environments. LED indicators are provided for confirming equipment operating status. Plug-and-play design ensures ease of installation requiring no user adjustments. Packaged in the exclusive rugged ComNet medium housing, these units may be either wall mounted, or may be DIN-rail mounted by the addition of ComNet model DINBKT4 adaptor. Features Electrical ports support 10/100/1000 Mbps Ethernet IEEE802.3 protocol Environmentally hardened for deployment in difficult unconditioned out-of-plant and roadside installations All ports support 1000 Mbps full duplex Ethernet data Status indicating LEDs provide rapid indication of critical operating parameters. IEEE 802.3 compliant Plug-and-play design ensures ease of installation and no electrical or optical adjustments are ever required. Voltage transient protection on all power and signal input/output lines provides protection from power surges and other voltage transient events. Designed to meet full compliance with the environmental requirements (ambient operating temperature, mechanical shock, vibration, humidity with condensation, high-line/low-line voltage conditions, and transient voltage protection) of NEMA TS-1/TS-2 and the Caltrans Specification for Traffic Signal Control Equipment. Electric Port Supports Auto-negotiation for Full Duplex or Half Duplex Data Throughput Applications 10/100/1000 Mbps Gigabit Ethernet High Speed Computer Links