Base Radio Systems Program
- http://www.eis.army.mil/brs/
- Provides information on the competitively awarded set of contracts that offer a complete menu of Land Mobile Radio products to all U.S. Federal Agencies worldwide. Managed by the Army.
Crudele Communications
- http://www.crucom.com/
- Sales and service for two-way radio trunking repeater systems. Conventional two-way including UHF, VHF and low-band. FCC licensing and Nextel Phones.
TETRA Association
- http://www.tetra-association.com/
- Organization representing users, manufacturers, operators, test houses and telecom agencies for terrestrial trunked radio, an open digital trunked radio standard defined by the European Telecommunications Standardisation Institute .
Trunking Information
- http://www.photonick.net/radio/
- Information on several Motorola systems, the EDACS system which is operated by the City of Clearwater, as well as conventional frequencies for the Greater Tampa Bay Area.
United States Patent: 5,822,314
- http://www.freepatentsonline.com/5822314.html
- Communications system and method of operation. A typical operational function, using timing information inherent in the transmissions, is the encryption/decryption process within the Trans European Trunked Radio (TETRA) standard.