Two-Way Radio
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- Gould Electronics
- Offers trunked radio solutions as well as shop watch schemes, conventional 2-way radio and fire service communications systems.
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- Land Mobile Spectrum Planning Options
- Article discussing the sharing of trunked public safety radio systems among Federal, State, and local organizations .
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- 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.
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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.
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- 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.
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- Directorate of Telecommunications (DTELS)
- Dedicated to former UK Home Office department responsible for providing wireless communication to Emergency Service and Central Government users from 1939 until it was privatised in 1994.
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- L.A.P.D. Communications
- Unofficial history of the Los Angeles Police Department Communications Division detailed in a series of photographs.
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- Dispatch
- Monthly publication for public safety dispatchers, supervisors and managers at law enforcement, fire and EMS agencies. Covers use and technology of radio systems, as well as other issues involving public safety dispatching.
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- Urgent Communications
- Industry news, analysis, and commentary from the magazine for dealers, private radio and wireless systems operators and large volume commercial, industrial and public safety communications end-users. Includes links to products, jobs, and research.
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- King Communications U.S.A., Inc.
- Manufacture and install mobile data terminals and vehicle tracking products. Includes downloadable brochures, product technical data and FAQs .
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- Micronet Ltd.
- Develop, manufacture and market a range of custom and off-the-shelf terminals used in a variety of data collection systems.
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- i-Mobile
- Manufacturer of mobile data terminals interfaced to wireless networks including trunked radio, GPRS, Mobitex. Pagers, dispatch, AVL, and GPS solutions.
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- California's Governor's Office of Emergency Services (OES)
- Coordinates the state's master mutual aid system which includes the two major sub-systems of law enforcement and the fire and rescue systems.
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- Shelby County Alabama 9-1-1 Center
- Provides information on provided services including staff, statistics, scanner frequencies, and education. Includes a photograph gallery .
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- California Public Safety Radio Association
- A non-profit organization of communications officials representing police, fire, EMS, forestry, and highway and conservation services.
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- Brabourne Communications Limited
- Provides wireless communications solutions for government, utilities, public safety, business and industry including design, supply, installation and support.
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- Intergraph Public Safety
- Supply public safety command and control systems for dispatching critical services. Includes product specifications and benefits, news and events, and career opportunities .