The Guardian-400 Serial or Analog radio is optimized for the 450-470 MHz licensed VHF band. Device is configured for full duplex operation. Designed for todays highspeed SCADA & Telemetry, Guardian networks provide a transparent 19200 bps digital link in a 25 kHz channel, or a 9600 bps digital link in a 12.5 kHz channel that is compatible with most protocols.

Guardian is available at VHF, UHF, and 900 MHz, and supports RNet and COR brand radio modems via the Dataradio Interoperability Standard (DI-OS). Selectable operating modes provide flexibility: RS-232, RS-422, and RS-485 compatible; simplex, half-duplex or full-duplex operation; RTS-CTS handshaking protocol or data activated transmission (DOX) mode. Transparent, asynchronous serial formats are supported, such as Modbus, Modbus-RTU, AB DF1, and various other protocol formats.

The Guardian wireless modem provides a high-speed data link suitable for a wide variety of applications requiring system security and diagnostic reporting. Designedfor speed and efficiency, Guardian provides over-the-air data rates up to 19.2 kbps in a 25 kHz channel.