• To anyone looking to acquire commercial radio programming software:

    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.

    If you are having trouble legally obtaining software please state so. We do not want any hurt feelings when your vague post is mistaken for a free request. It is YOUR responsibility to properly word your request.

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

    The various other vendors often permit their dealers to sell the software online (i.e., Kenwood). Please use Google or some other search engine to find a dealer that sells the software. Typically each series or individual radio requires its own software package. Often the Kenwood software is less than $100 so don't be a cheapskate; just purchase it.

    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).

    This is a large and very visible forum. We cannot jeopardize the ability to provide the RadioReference services by allowing this activity to occur. Please respect this.
  • Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:
    https://forums.radioreference.com/rants/224104-official-thread-live-audio-feeds-scanners-wait-encryption.html

Simple question about Talk Groups

Status
Not open for further replies.

Skadar

Member
Joined
Mar 5, 2008
Messages
16
Location
Stamford, CT
I can't seem to find an answer to this newbie question about Talk Groups.

Is the programming of Talk Group IDs into a scanner required to get trunking to work? Or are they merely for your convenience in being able to see what service is currently speaking?
 

DickH

Member
Joined
Mar 12, 2004
Messages
4,061
Skadar said:
I can't seem to find an answer to this newbie question about Talk Groups.
Is the programming of Talk Group IDs into a scanner required to get trunking to work? Or are they merely for your convenience in being able to see what service is currently speaking?
Once you understand trunking you will understand Talk Groups. Here is a simple explanation.

How a Motorola trunking system works
OVERVIEW:
The object of trunking is to allow many users to share a relatively few frequencies.
A trunking system is controlled by a computer. Information (data) is exchanged between the radios and the computer on a control channel, sometimes called a data channel. It sounds like a strong buzz.
A large system 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. Some scanners need only the control channels to track the entire system. In that case just enter only the control channels.

After the frequencies are entered, the banks become scan lists or sub-banks that hold the Talk Groups or IDs.

Each group of users (Fire, Police, etc.) is assigned TALK GROUPS. In a Motorola Type II system, the most common type, TGs are usually in 32 number steps starting with 16 and going up to 65536; 16, 48, 80 --- 4656, 4688, 4720 --- 28944, 28976, etc. System radios can have more than 100 TGs programmed into them.

When a user pushes the talk button on his radio, data is sent to the computer. The computer chooses an unused freq. and sends that data to all the radios using the TG of the originating unit. This all happens in a fraction of a second and it happens EVERY time a radio is used.

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 (TG 4528 on 855.9625)
Engine 4 responding (TG 4528 on 858.4375)

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

Some scanners have 2 modes, OPEN and CLOSED or SEARCH and SCAN.
OPEN or SEARCH receives all TGs using the system.
CLOSED or SCAN receives only the TGs YOU have put into the scan lists.

This should get you started, but you should read the manual carefully. You may need to read it several times.
 

Don_Burke

Member
Joined
Jan 16, 2007
Messages
1,180
Location
Southeastern Virginia
Skadar said:
I can't seem to find an answer to this newbie question about Talk Groups.

Is the programming of Talk Group IDs into a scanner required to get trunking to work? Or are they merely for your convenience in being able to see what service is currently speaking?
I can run mine in the open mode and hear all of the talkgroups without entering any.

If I want to exclude the garbage trucks and convention center housekeeping, entering talkgroups can make that possible.
 

Skadar

Member
Joined
Mar 5, 2008
Messages
16
Location
Stamford, CT
DickH said:
Some scanners have 2 modes, OPEN and CLOSED or SEARCH and SCAN.
OPEN or SEARCH receives all TGs using the system.
CLOSED or SCAN receives only the TGs YOU have put into the scan lists.
Boom! This looks like the information I was missing. I programmed the 6 frequencies of my local trunk system (EDACS) in order but chose NOT to enter any Talk Group IDs at this time. I recall that Win97 defaulted the bank as CLOSED. This appears to be the reason why my scanner appears to be picking up signals from the trunk, but I am unable to actually hear anything.

I'll try setting the mode as OPEN to see if I can hear anything. Otherwise, I'll go ahead and enter the Talk Group IDs and see how that works.

And thanks for the concise explanation of trunking. Much of the info out there is a bit overwhelming for a newbie.
 
Status
Not open for further replies.
Top