455U-D radio modem uses multiple device connectivity and two data ports for long-distance communications with military-grade security. Each modem can handle two independent connectivity applications simultaneously. Included is a separate, dedicated serial port for configuration and system management diagnostics. The modem is suitable for SCADA systems distributed over wide geographic areas, or for industrial users requiring the higher level of reliability offered by licensed radio channels. It has user configurable RF power of 0.5-5 W, and frequency 380-512 MHz. A built-in UPS protects against uncertain power supply.