Večeřa, Filip2020-07-282020-07-2820181336-8281http://drepo.uniza.sk/handle/hdluniza/226Fire rescue departments, military, emergency medical and public safety services, require a high degree of radio transmission security. Tetrapol is a technology that guarantees high security of radio transmission. This technology is based a number of national radio communication networks in the space of public safety. This paper focuses on the description of Tetrapol technology implementation in national security network in the Czech Republic - Pegas.czhttp://creativecommons.org/licenses/by/4.0/TetrapolcommunicationnetworkPegastransmission securityArticlehttps://doi.org/10.26552/pte.C.2018.1.7