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25 years of the TETRA standard and technology for contemporary digital trunking systems of professional mobile radio communications
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TETRA Trunked Radio System Operation | Types of Communication Channels | TETRA Features |BasicTrunked - YouTube
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Nokia THR 880i professionel mobile radios to use with the new European Tetra (Terrestrial Trunked Radio) networks for public safty and security are seen at the CeBIT computer fair in Hanover March
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