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| | * [[SmarTrunk]] | | * [[SmarTrunk]] |
| | * [[TETRA]] | | * [[TETRA]] |
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| − | == Motorola ==
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| − | === Types ===
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| − | * [[Type I]]
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| − | * [[Type II]]
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| − | * [[Type IIi]]
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| − | * [[Hybrid]]
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| − | * [[Type IIi Hybrid]]
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| − | === Flavors ===
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| − | * [[Type I Privacy Plus]]
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| − | * [[Type II Smartnet]]
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| − | * [[Type II SmartZone]]
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| − | * [[Type II SmartZone OmniLink]]
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| − | * [[ASTRO]]
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| − | * [[ASTRO-25]]
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| − | === Miscellaneous Information on Motorola Trunked Radio Systems ===
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| − | * [[Motorola Trunked Infrastructure Versions]]
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| − | * [[Motorola Talkgroups]] (Conversions, Formats, etc)
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| − | == Motorola iDEN ==
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| − | === Overview ===
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| − | This is a proprietary trunked radio system format developed and marketed by Motorola. iDEN is the technology used by Nextel cellular telephones. Aeronautical Radio Inc. (ARINC) is in the process of building an 800/900 MHz iDEN network covering major airports nationwide in the United States.
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| − | == M/A-COM EDACS ==
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| − | === Overview ===
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| − | [[EDACS]] was created by General Electric and then further engineered by Ericsson. The [[EDACS]] technology has changed numerous owners and now is currently owned by M/A Com (a Tyco Subsidiary)
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| − | [[EDACS]] is a lot similar to Motorola trunking. It provides for the same features yet has different names for them. Simulcast networks work the same yet EDACS networks, which are similar to AMSS networks, are all independent of each other but still interconnected. A radio is programmed with each system independently and selects each system based on control channel quality. Rather than have a site number a system is basically assigned a simple number to differentiate it.
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| − | Motorola uses a specific bandplan or a complicated frequency defined system to assign frequencies. [[EDACS]] uses what are called Logical Channel Numbers [[LCN]]. Rather than assign a frequency with a specific identifier, each frequency at a site is assigned a number between 1 through 26. When a channel announcement occurs it contains only the [[LCN]]. With this in mind each radio must be programmed with which frequency corresponds to which [[LCN]].
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| − | Digital communications is also available for EDACS systems and exists in two different formats, [[AEGIS]] and [[ProVoice]]. [[AEGIS]] was the first format introduced and ProVoice was the last and current format. Neither one is APCO-25 compliant unlike Motorola’s [[ASTRO]], which is. Also, neither [[AEGIS]] nor [[ProVoice]] can communicate with each other.
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| − | There are three different types of [[EDACS]] Control channels. The most common is the Wideband EDACS control channel, which operates at 9600 baud. There is also a narrowband EDACS control channel which operates at 4800 baud and primarly is used for wide-area EDACS systems in the 900 MHz band. Finally, there is the wideband EDACS "encrypted" control channel which is basically a variation on the standard 9600 baud wideband control channel. MA/COM's trademark name for this feature is called [[ESK]] (EDACS System Key).
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| − | === Flavors ===
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| − | * [[EDACS Standard]]
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| − | * [[EDACS Standard with ESK]]
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| − | * [[EDACS Narrowband]]
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| − | * [[EDACS Narrowband Networked]]
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| − | * [[EDACS Networked]]
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| − | * [[EDACS Networked with ESK]]
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| − | * [[SCAT]]
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| − | === Links ===
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| − | * [[ProVoice]] - MA/COM's [[IMBE]] Digital Voice Solution
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| − | * [[AEGIS]] - MA/COM's older Digital Voice Solution
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| − | * [[ESK]] - EDACS System Key
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| − | * [[EDACS Talkgroup Conversions]]
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| − | * [[EDACS Fleetmap]] Information
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| − | * [http://www.macom-wireless.com/ MA/COM Wireless Corp Homepage] - The homepage for the MA/Com Wireless Corp, which designs, develops, and implements EDACS systems and technologies.
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| − | * [http://www.racom.net/Products.htm Racom Inc] - Distributors of Ericsson EDACS equipment. See this link to their products and services page which has detailed information on Ericsson EDACS mobile and portable radios.
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| − | * [http://hallelectronics.com/getech/ Hall Electronics GETECH Page] - Lots of detailed information on progamming Com-Net Ericsson Radio equipment here. Cable pin-outs, connections, software versions etc can be found at this page for most of MA/COM's radio equipment.
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| − | == M/A-COM OpenSky ==
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| − | === Overview ===
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| − | OpenSky overview goes here.
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| − | == Project 25 ==
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| − | === Overview ===
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| − | Project 25 trunked radio systems are so named because they follow the open [http://www.apcointl.org/ APCO] Project 25 standard for public safety trunked radio systems. Multiple vendors make and sell Project 25 systems and compliant radios. Audio on these systems is exclusively digital using the APCO Project 25 Common Air Interface (CAI) standard.
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| − | == LTR ==
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| − | === Overview ===
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| − | LTR stands for "Logical Trunked Radio." LTR systems do not have a dedicated control channel like Motorola and EDACS systems. Each repeater has its own controller and all of these controllers are coordinated together. Even though each controller monitors its own channel, one of the channel controllers is assigned to be a master and all the other controllers report to it. Typically on LTR systems, each of these controllers periodically sends out a data burst (usually approximately every 10 seconds on LTR Standard systems) so that the subscriber units know that the system is there. The idle data burst can be turned off if desired by the system operator. Some systems will broadcast idle data bursts only on channels used as home channels and not on those used for "overflow" conversations. To a scanner user the idle data burst will sound like a short blip of static like someone keyed up and unkeyed a radio within about 1/2 second. This data burst is not sent at the same time by all the channels but happen randomly throughout all the system channels.
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| − | === Flavors ===
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| − | * [[LTR Standard]]
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| − | * [[LTR Standard and Passport]]
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| − | * [[LTR Passport]]
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| − | * [[LTR MultiNet]]
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| − | == SmarTrunk ==
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| − | === Links ===
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| − | * [http://www.smartrunk.com/en/Download/Information/scan_based_trunking.html SmarTrunk Scan-Based Trunking Explanation]
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| − | == MPT-1327 ==
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| − | === Overview ===
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| − | MPT-1327 overview goes here.
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| − | == TETRA ==
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| − | === Overview ===
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| − | TETRA overview goes here.
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