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For computer networking, trunking describes using multiple network cables / ports inside parallel to increase a hyperlink speed beyond a restricts of any a only single cable or even port. (Watch port trunking for more details.)

Inside telecommunication, the term trunk has a ensuing meanings : Around the communications network, a single transmission channel between two points that come switching centers or even nodes, or two. Understand Trunked Radio Systems The circuit between switchboards or even more switch devices, equally distinguished from either circuits which extend between telephone exchange switching equipment & information origination/termination equipment.

Note: Trunks can be utilized to interconnect switches, like major, minor, public & personal switches, to form networks. Around popular idiom & in the UK at least the Trunk call for for wwhen an extended few feet away of these as opposed to the Local call. Look at Subscriber trunk dialling and Trunk vs Toll. Trunking in an exchange
Trunking too refers to the connection of switches and circuits within the telephone exchange .

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.

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.

Dade County Frequencies and Talkgroups
Provides a listing of aviation, marine, business, and federal frequencies together with links to related resources .

GTRAC
Resources for EDACS TrunkTracking. Includes guides on frequencies, programming, talk groups, and related links.

Trunked Radio Information
Source for monitoring trunked radio communications. Provides a range of information including frequency databases, discussion forums, products, and related links .

Land Mobile Spectrum Planning Options
Article discussing the sharing of trunked public safety radio systems among Federal, State, and local organizations .

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.

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 .

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 .

Base Radio Systems Program
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 .