Trunked Radio Systems
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A trunked radio system is a specialized repeater system with one or more towers, and multiple frequencies, which allows channelized, semi-private conversations between many more groups of users than it actually has allocated RF channels; this is an example of statistical multiplexing. There are many different implementations of trunked business and public-safety radio, using different trunking protocols (like P25 CAI, LTR and Smartzone) and different audio modulations (like FM, NFM, and P25), but they all function in similar ways, and current generation scanners can receive most of them.
Please read the Trunking Basics overview first. Here is UPMan's excellent description on trunking. If you still have questions, feel free to post on the General Scanning Discussion forum at Radioreference.
- Ben Saladino's Trunktracking Tips
- This site is a bit dated, but still contains some useful basic information
- Uniden Multi-Site Trunking
- Articles written by Dan Veeneman, MT Scanning Report columnist
- Rebanding Wiki Article
- GTRAC EDACS info
- Motorola Trunking theory/concepts
- Police Scanner info Trunked Radio Systems page
- The Trunkcom mailing list at QTH.net is another great resource for questions and answers
- WinRadio's Trunking Theory page
- For more technical topics regarding trunktracking, please see articles listed in the Category:Trunktracking Topics.
- For additional FAQs, please see articles listed in the Category:Trunktracking FAQ
Trunked Radio System Types
All forum links go to RadioReference
- M/A-COM, Inc.
- EF Johnson
Sadly some systems are encrypted - and no scanner will ever copy them. A brief listing of these agencies can be found in the Encrypted Agencies article.
Trunked Radio Terms
- For additional terms, please see articles listed in the Category:Trunktracking Glossary