View source for Trunked Radio Systems

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.


== Overview ==

Please read the [[Trunking Basics]] overview first. [[Media:Trunking description.pdf|Here]] is UPMan's excellent description on trunking. If you still have questions, feel free to post on the [https://forums.radioreference.com/forums/general-scanning-discussion.28/ General Scanning Discussion] forum at Radioreference.

== Trunking FAQs ==
* [http://www.bensware.com/scandfw/tttipsfaqs.htm 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
** [http://www.signalharbor.com/ttt/00jan/index.html Trunking Theory 101]
** [http://www.signalharbor.com/sr/05apr/index.html Understanding Trunking]
* [http://wiki.radioreference.com/index.php/Rebanding Rebanding Wiki Article]
* [http://gtrac.ztn.net/ GTRAC EDACS info]
* [http://www.thebriarpatch.org/trunking/ Motorola Trunking theory/concepts]
* [http://www.police-scanner.info/scanning/trunked-radio-systems.htm Police Scanner info Trunked Radio Systems page]
* The [http://mailman.qth.net/mailman/listinfo/trunkcom Trunkcom] mailing list at QTH.net is another great resource for questions and answers
* [http://www.winradio.com/home/trunking_theory.htm WinRadio's Trunking Theory page]
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* 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.
** [[EDACS Provoice]]
** [[EDACS]]
** [[OpenSky]]
* EF Johnson
** [[LTR]]
* [[Motorola]]
** [[iDEN]]
** Motorola Harmony (see [[iDEN]])
** [[Motorola Type I|Type I]]
** [[Motorola Type II|Type II]]
*** [[Motorola Type IIi Hybrid|Type IIi Hybrid]]
*** [[Motorola Type II Smartnet|Type II Smartnet]]
*** [[Motorola Type II SmartZone|Type II SmartZone]]
*** [[Motorola Type II SmartZone OmniLink|Type II SmartZone OmniLink]]
*** [[Motorola Type II VOC|Type II VOC]]
* [[SmarTrunk]]
* [[TETRA]]
* [[TETRAPOL]]


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.

The current 800MHz Public Safety band plan change is discussed under [[Rebanding]].  You may also find references to what scanners may be supported by following links from the [[Main Page]].

== Trunked Radio Terms ==

* [[Failsoft]]
* [[Control Channel Only]]
* [[Site trunking]]
* [[Simulcast]]
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*For additional terms, please see articles listed in the [[:Category:Trunktracking Glossary]]
 
== Additional Trunking Topics==
* [[Common Trunking Programming Questions]]
* [[Determining Base/Step/Offset for VHF/UHF Motorola Systems]]
* [[Determining Motorola Type I Fleetmaps]]
* [[Locating additional LTR frequencies]]
* [[Mapping an LTR System]]
* [[Trunked Radio Decoders]]



[[Category:RR Glossary]]
[[Category:Database Glossary]]
[[Category:Military Glossary]]
[[Category:Professional Radios Glossary]]
[[Category:Receivers Glossary]]
[[Category:Scanners Glossary]]
[[Category:Signal Analysis and Decoding Glossary]]
[[Category:Software Glossary]]
[[Category:Trunktracking Glossary]]
[[Category:Database FAQ]]
[[Category:Military FAQ]]
[[Category:Scanners FAQ]]
[[Category:Software FAQ]]
[[Category:Trunktracking FAQ]]