The RF500M is a versatile radio modem for networks with UHF/VHF radios, typically serving as an interface between the data logger and radio. In addition to serving as a field modem connected to a data logger, the RF500M can also be used as a stand-alone repeater, or as a base-station modem connected to a computer. The RF500M is generally used with legacy or existing PakBus and mixed-array/dial-up networks. The RF500M works with our RF320-series radios, RF310-series radios, RF300-series radios, or any radio and modem combination that outputs a demodulated byte stream via RS-232. For new installations, please consider one of our spread-spectrum radio solutions, or contact Campbell Scientific to discuss the use of other licensed radio options.  The RF500M is an appropriate choice for any ALERT(1) store-and-forward repeaters or base-station-decoder applications. For ALERT2 applications, refer to the ALERT200 ALERT2 Basic Remote Data Platform.