From The RadioReference Wiki
TETRA is an acronym for TErrestrial Trunked RAdio.
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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 tetra decoder using linux, 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 no decryption. 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
- OSMOCOM TETRA FAQ - OsmocomTETRA Frequently Asked Questions