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United States Patent: 5,815,799
Priority system for a wide area transmission trunked communication system. Here is the LTR Multi-Net Patent that explains the signaling protocol. (infos)United States Patent: 5,822,314
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. (infos)
Dade County Frequencies and Talkgroups
Provides a listing of aviation, marine, business, and federal frequencies together with links to related resources . (infos)
GTRAC
Resources for EDACS TrunkTracking. Includes guides on frequencies, programming, talk groups, and related links. (infos)
Land Mobile Spectrum Planning Options
Article discussing the sharing of trunked public safety radio systems among Federal, State, and local organizations . (infos)
Trunking Information
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. (infos)
TETRA
Forum 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 . (infos)
Actions Communications, Inc
Provide voice and data communications using LTR trunking technology throughout the greater Puget Sound area. Includes product listings and service area information . (infos)
Champion Communication Services, Inc.
Provide UHF radio communication products and operate UHF trunked networks providing voice, dispatch and wireless data services. Includes operational area information and a listing of dealers . (infos)
Genesis Group
Article describing the basics of trunking together with an industry glossary and available software programs. (infos)