Private Mobile Radio (PMR)
Private or Professional Mobile Radio (PMR), or Public Access Mobile Radio (PAMR) is used in many countries around the world, and new technology is being developed to ensure it keeps up with today's needs. It is widely used by the emergency services, and this is particularly true of the new Tetra system that is being widely deployed.
An overview of private mobile radio
(PMR) - the various standards that are available to use.
Analogue PMR systems
Analogue PMR systems are still in widespread use and are able to provide a useful service. Not only are the simple "local" systems in use but also other systems that enable trunking to be used to cover wider areas and to make better use of the available spectrum.
An overview of the basic "local" PMR system
Trunking using the MPT1327 system
Tetra
The new Tetra system is being used increasingly, especially by the emergency services. It provides several advantages over cellular phones including fast call set up times and the ability to act like a walkie talkie.
An Overview of TETRA private mobile radio
(PMR)
APCO
PROJECT 25
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