The RA440 bridges UHF RTUs to the GPRS network via the A850 gateway. It incorporates a 500mW UHF radio modem and a Motorola quad-band GPRS modem. Where the regular A440 connects to the A850 gateway by means of a cable, the RA440 ('Remote A440') connects via GPRS
The RA440 is used in areas that lack GSM coverage and don't have access to mains power, internet and phone connection. In this situation RTU's can be installed on site and the RA440 will be placed at the nearest location that has GSM/GPRS coverage. The RTU's can then communicate with the RA440 via UHF and the RA440 then communicates with the A850 gateway via GSM/GPRS. A standard solar panel is used to charge the RA440's internal battery. If more power is needed a standar 12 Volt battery can be connected to the external power port and/or a secondary battery pack can be installed inside the RTU.
Upgrades to the A850 gateway provide the capability to connect to up to 10 RA440's.
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