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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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TETRA Trunked Radio System Operation | Types of Communication Channels | TETRA Features |BasicTrunked - YouTube
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Figure 1 from Design of TETRA-based dedicated radio communication system for urban rail transit | Semantic Scholar
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