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    Please do not make requests for copies of radio programming software which is sold (or was sold) by the manufacturer for any monetary value. All requests will be deleted and a forum infraction issued. Making a request such as this is attempting to engage in software piracy and this forum cannot be involved or associated with this activity. The same goes for any private transaction via Private Message. Even if you attempt to engage in this activity in PM's we will still enforce the forum rules. Your PM's are not private and the administration has the right to read them if there's a hint to criminal activity.

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    To obtain Motorola software see the Sticky in the Motorola forum.

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    For M/A Com/Harris/GE, etc: there are two software packages that program all current and past radios. One package is for conventional programming and the other for trunked programming. The trunked package is in upwards of $2,500. The conventional package is more reasonable though is still several hundred dollars. The benefit is you do not need multiple versions for each radio (unlike Motorola).

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what is trunking?

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DickH

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Mar 12, 2004
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what is trunking?
The object of trunking is to allow many users to share a relatively few frequencies.
A trunking system is controlled by a computer. Information is sent and received from the radios to the computer on a control channel, sometimes called a data channel. It sounds like a strong buzz. When a scanner is trunking properly, you will not hear the control channel.

A large Motorola system (the most common) can have up to 28 freqs., 4 of which may be used as control channels. The control channel may be changed once a day or as often as the programmer decides. Newer scanners need only the control channel to track the entire system, but it is best to put in all the freqs. in case they change the CC some day. Some systems seldom change the control channels.

Each group of users (Fire, Police, etc.) are assigned identifiers called TALK GROUPS or IDs. In a Motorola Type II system, the most common type, TGs are usually in 32 number steps from 16 to 65536; 16, 48, 80 --- 4656, 4688, 4720 --- 28944, 28976, 29008, etc. System radios have up to 160 TGs programmed into them.

When a mic is keyed, data is sent to the computer. The computer chooses an unused freq. and sends that data to all the radios set to the TG of the originating unit. This all happens in a fraction of a second and it happens EVERY time a mic is keyed.

EXAMPLE:
Fire Dispatch calling Engine 4 (TG 4528 on 856.7125)
Engine 4 answering Dispatch (TG 4528 on 867.2625)
Respond to 73 Elm Street for a grass fire (TG 4528 on 866.9625)
Engine 4 responding to 73 Elm Street (TG 4528 on 858.4375)

If you have entered TG 4528 into your scanner, it will decode the control channel data and automatically change frequencies to follow the conversation on TG 4528.
 

morfis

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Jan 24, 2004
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The object of trunking is to allow many users to share a relatively few frequencies.
A trunking system is controlled by a computer. Information is sent and received from the radios to the computer on a control channel, sometimes called a data channel. It sounds like a strong buzz. When a scanner is trunking properly, you will not hear the control channel.

A large Motorola system (the most common) can have up to 28 freqs...............................
The OP seems to be in Cheshire, UK and from there will not be able to monitor any trunked systems using Motorola, EDACS or LTR protocols. Plenty of MPT1327 systems in use however
 

tommyscan

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Location
seaford new york
Trunking allows you to hear multiple agencies on a group of frequencies ,which are shared instead of all those agencies having individual frequencies!!!!!!!!
 
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