TETRA / PMR: radio communication in the era of cyberthreats
https://www.stormshield.com/news/tetra-pmr-radio-communication-in-the-era-of-cyberthreats/
Developed in Europe in the 1990s, Terrestrial Trunked Radio (TETRA) is a system for managing digital mobile communications for emergency services. The system serves as a standard for building critical Professional Mobile Radio (PMR) networks. But as technology evolves and new applications arise—such as the...