D-STAR
Videos
D-STAR is a digital voice and data protocol specification for amateur radio. The system was developed in the late 1990s by the Japan Amateur Radio League and uses minimum-shift keying in its packet-ba
ICOM IC-91AD handheld transceiver with the D-STAR UT-121 digital voice board installed
TETRA
Videos
Terrestrial Trunked Radio, a European standard for a trunked radio system, is a professional mobile radio and two-way transceiver specification. TETRA was specifically designed for use by government a
D-STAR
…the type of linking done by other popular repeater-linking systems (IRLP and EchoLink) are being worked on. Like other commercial digital modes (P25, TETRA, DMR, dPMR, NXDN, System Fusion), D-STAR uses a closed-source proprietary voice codec (AMBE) patented by Digital Voice Systems, Inc. (DVSI) because it…
TETRA DMO Amateur radio repeater
Cell initial selection
Cell improvable
Cell usable