![]() ![]() The first TETRA systems were installed in 1997. ![]() The main differences between these professional mobile radio (PMR) systems and public mobile radio systems such as GSM are faster call set-up, group calls, priority calls, encryption, and ability to make direct calls without connection via a base station.Īlthough TETRA was adopted by the European Telecommunications Standardisation Institute (ETSI) as the European standard, Tetrapol delivered operational systems at an earlier date, rolling out the worlds first large-scale digital PMR network in 1988 (RUBIS for the French National Gendarmarie). ![]() How did it happen and with what outcomes?īoth Tetrapol and TETRA are digital, cellular trunked radio systems. Personal Police users The dark side Tetrapol? Newsfeeds National Realities O2 Airwave No conspiracy Anecdotes. ![]()
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