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Difference between revisions of "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.
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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.
  
  
 
== Overview ==
 
== Overview ==
  
Please read the [[Trunking Basics]] overview first. If you still have questions, feel free to post on the [http://www.radioreference.com/forums/forumdisplay.php?f=71 Trunking] forum at Radioreference.
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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 [http://www.radioreference.com/forums/forumdisplay.php?f=71 Trunking] forum at Radioreference.
  
 
== Trunking FAQs ==
 
== Trunking FAQs ==
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* The [http://mailman.qth.net/mailman/listinfo/trunkcom Trunkcom] mailing list at QTH.net is another great resource for questions and answers
 
* 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]
 
* [http://www.winradio.com/home/trunking_theory.htm WinRadio's Trunking Theory page]
<br>
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<br/>
* For more technical topics regarding trunktracking, please see our [[:Category:Trunktracking Topics|Trunktracking Topics]] article
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* For more technical topics regarding trunktracking, please see articles listed in the [[:Category:Trunktracking Topics]].
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* For additional FAQs, please see articles listed in the [[:Category:Trunktracking FAQ]]
  
 
== Trunked Radio System Types ==
 
== Trunked Radio System Types ==
 
All forum links go to RadioReference
 
All forum links go to RadioReference
 
* M/A-COM, Inc.
 
* M/A-COM, Inc.
** [http://www.radioreference.com/forums/forumdisplay.php?f=23 M/A-Com forum]
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** [http://forums.radioreference.com/harris-ma-com-ge-ericsson-forum/ M/A-Com forum]
 
** [[EDACS Provoice]]
 
** [[EDACS Provoice]]
 
** [[EDACS]]
 
** [[EDACS]]
 
** [[OpenSky]]
 
** [[OpenSky]]
 
* EF Johnson
 
* EF Johnson
** [http://www.radioreference.com/forums/forumdisplay.php?f=24 LTR forum]
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** [http://forums.radioreference.com/ltr-trunking/ LTR forum]
 
** [[LTR]]
 
** [[LTR]]
 
* [[Motorola]]
 
* [[Motorola]]
** [http://www.radioreference.com/forums/forumdisplay.php?f=22 Motorola forum]
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** [http://forums.radioreference.com/motorola-forum/ Motorola forum]
 
** [[iDEN]]
 
** [[iDEN]]
 
** Motorola Harmony (see [[iDEN]])
 
** Motorola Harmony (see [[iDEN]])
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** [[Motorola Type II|Type II]]
 
** [[Motorola Type II|Type II]]
 
*** [[Motorola Type IIi Hybrid|Type IIi Hybrid]]
 
*** [[Motorola Type IIi Hybrid|Type IIi Hybrid]]
*** [[Motorola Type II SmartNet|Type II Smartnet]]
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*** [[Motorola Type II Smartnet|Type II Smartnet]]
 
*** [[Motorola Type II SmartZone|Type II SmartZone]]
 
*** [[Motorola Type II SmartZone|Type II SmartZone]]
 
*** [[Motorola Type II SmartZone OmniLink|Type II SmartZone OmniLink]]
 
*** [[Motorola Type II SmartZone OmniLink|Type II SmartZone OmniLink]]
 
*** [[Motorola Type II VOC|Type II VOC]]
 
*** [[Motorola Type II VOC|Type II VOC]]
 
* [[MPT-1327]]
 
* [[MPT-1327]]
** [http://www.radioreference.com/forums/forumdisplay.php?f=27 MPT-1327 forum]
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** [http://forums.radioreference.com/mpt-1327-tetra-forum/ MPT-1327 forum]
 
* [[Project 25]]
 
* [[Project 25]]
** [http://www.radioreference.com/forums/forumdisplay.php?f=25 P-25 forum]
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** [http://forums.radioreference.com/project-25-technologies/ P-25 forum]
 
* [[SmarTrunk]]
 
* [[SmarTrunk]]
 
* [[TETRA]]
 
* [[TETRA]]
 
* [[TETRAPOL]]
 
* [[TETRAPOL]]
  
[http://www.monitoringtimes.com/html/trunkedscanners.html Here] is a link from Monitoring Times magazine that outlines the various trunktracking scanners, and what system(s) they will cover. <br>
 
  
 
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.
 
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.
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* [[Site trunking]]
 
* [[Site trunking]]
 
* [[Simulcast]]
 
* [[Simulcast]]
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<br/>
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*For additional terms, please see articles listed in the [[:Category:Trunktracking Glossary]]
 
   
 
   
 
== Additional Trunking Topics==
 
== Additional Trunking Topics==
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* [[Locating additional LTR frequencies]]
 
* [[Locating additional LTR frequencies]]
 
* [[Mapping an LTR System]]
 
* [[Mapping an LTR System]]
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* [[Trunked Radio Decoders]]
  
[[Category: RR Glossary]]
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[[Category:RR Glossary]]
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[[Category:Database Glossary]]
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[[Category:Military Glossary]]
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[[Category:Professional Radios Glossary]]
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[[Category:Receivers Glossary]]
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[[Category:Scanners Glossary]]
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[[Category:Signal Analysis and Decoding Glossary]]
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[[Category:Software Glossary]]
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[[Category:Trunktracking Glossary]]
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[[Category:Database FAQ]]
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[[Category:Military FAQ]]
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[[Category:Scanners FAQ]]
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[[Category:Software FAQ]]
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[[Category:Trunktracking FAQ]]

Revision as of 14:14, 17 January 2017

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. Here is UPMan's excellent description on trunking. If you still have questions, feel free to post on the Trunking forum at Radioreference.

Trunking FAQs


Trunked Radio System Types

All forum links go to RadioReference


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


Additional Trunking Topics