PMR stands for Private Mobile Radio and includes a range of wireless communications systems which are typically designed for dedicated use by individual organisations. There are several recognised standards, for example: TETRA, DMR, dPMR and other applications which include private security systems, fleet management and building facilities.
TETRA, which stands for TErrestrial TRunked RAdio, is the most significant standard in the UK and was developed to extend the range of Public Mobile Radio networks to support larger organisations and the emergency services. In the UK the emergency services use a dedicated mobile communications network provided by Airwave using the TETRA standard.
DMR Tier III trunking is gaining popularity as ‘legacy MT1327’ systems are migrated from analogue PMR to DMR. This would be of interest to large in-building and wide area uses where TETRA would not be cost effective. The added advantage of IP connection and value added applications makes this an effective proposition, as an example, for Utilities integrated telemetry and voice requirements, airports and railway infrastructure outside of GSM-R.