South Australia GRN (SAGRN)
The South Australian Government Radio Network is a trunked radio network usually using Motorola SmartZone. In essence this is a system of interconnected repeater sites, mobile (vehicle mounted), portable and static radio transceivers used within Australia for radio communications.
The system is employed in South Australian by Country Fire Service, Metropolitan Fire Service, Ambulance Service, State Emergency Service, Department Of Fisheries, Volunteer Marine Rescue, Department Of Transport, St John Ambulance. It is in use in several other government agencies, as well as some private companies.
The SAGRN provides both analogue and digital voice radio communications. The South Australian Police department (SAPOL) and South Australian Department of Fisheries use encrypted digital radios while all other users use unencrypted analogue radios. Frequencies are allocated dynamically to each TalkGroup (a group of authorised, connected radios) as required and are only activated in areas which contain radios belonging to that TalkGroup. The network also has Multi-Agency TalkGroups that allow the different services to be able to talk to each other during mass emergencies, major events or whenever is needed. These operate on analogue, without encryption. The SAGRN data network is also used by the South Australian Police for their in-vehicle mobile data terminals.
All radio communications frequencies are subject to licensing by the ACMA. Those licensed to the GRN are outside of the Citizen's band, and as such are relatively secure from casual interference, although they can be monitored by scanners (requiring a trunk or trunking scanner).
Read more about this topic: Government Radio Network (Australia)
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