From The RadioReference Wiki
TETRA is an acronym for TErrestrial Trunked RAdio.
Tetra is an open voice standard developed by the European Telecom Standards Institute (ETSI) and is in use primarally overseas and in Europe. It uses a 4-slot TDMA channel. Tetra systems use the TETRA Control Channel.
TETRA uses by default air interface strong encryption and, as a result, there is no scanner available that can monitor TETRA Voice.
- osmo-tetra - is a open source decoder using gnuradio and USRP1/2 for signal processing. The osmo-tetra project aims at implementing the sending and receiving part of the TETRA MAC/PHY layer. You can learn more about how TETRA works on its lowest level, but cant decrypt voice. Currently, it can receive, demodulate TETRA downlink signals of real-world TETRA networks display information about SYNC, SYSINFO, MM and CMCE PDUs.
- TETRA Facts and Overview
- TETRA MOU Home Page - this is the web site for the TETRA MOU (Memorandum of Understanding) which is the organization responsible for developing and publishing the TETRA Digital Trunked Radio Standard.
- Motorola's TETRA Home Page - lots of information here regarding Motorola's entry into the TETRA market, news, information, and product descriptions.
- ETSI Telecom Standards - TETRA Information and technical documentation on the ETSI Standards Website.
- TETRA Digital Standard Information - Excellent web site run by Nokia which outlines the TETRA standard and its uses for public safety and commercial environments.
- TETRA on Wikipedia
- TETRA Forum Poland - best source of information about TETRA industry in Poland