25 years of the TETRA standard and technology for contemporary digital trunking systems of professional mobile radio communications
What is TETRA and Why You Choose It? - Hytera
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
Terrestrial Trunked Radio (Tetra) - Network Encyclopedia