How Do You Use Trunk System?

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3adam11

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May 28, 2006
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I have no idea how to use the trunk system on my scanner. The book "Police Call" did not help me at all with explaining how to use the system. I am so confused with everything about trunking. Freqs, chs, bank, etc. If anyone could please explain to me how to use the trunk system I would really appreciate it.
 

VintageJon

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Explaining the theory of a "trunked radio system" is far easier than implementing it on a scanner.

As you know this refers to a system where the Control, or Base, Station locks onto the mobiles and they skip freqs together on every transmission according to encoded info prefacing the voice transmission.
(Oh, I'm sure I'll be corrected and rightly so, no doubt. Just trying to keep it simple and general- he said in a pre-emptive defensive action.)

Before Austin TX went APCO 25 digital, I worked for an evening to get the Pro91 to trunk and only got Water Works and other ho-hum stuff. Blew it off and went back to Conventional where the action was.
Now I run Pro-96 for the most part. Programed with Win96, and it trunks the APCO here like a mother... (Also OK for EDACS on LCRA, Lower Colorado River Authority, coms.)

APCO 25 is also a trunked system but it's far more complex and digital. You didn't mention what your scanner is. If it's an RS then it MUST be Pro96 or base 2096 to do digital.

Say, that's a good question! What scanner have you, Sir?

I see you also don't mention your 10-20. What system do you want to trunk??
You may want to look at what systems are in use in your area before you worry much about trunking. What's your area-of-interest?

73's
Jon
 

3adam11

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May 28, 2006
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I see you also don't mention your 10-20. What system do you want to trunk??
You may want to look at what systems are in use in your area before you worry much about trunking. What's your area-of-interest?


I have a Pro95 Dual Trunk Scanner. I don't exactly know what you mean by system. Areas I would like to listen in on with the scanner using the trunking system is chicago and the surrounding suburbs.
 

mike_webb59

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Jul 18, 2005
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Location
New Braunfels, TX
FREQUENCIES
1. select a bank (let's say "5")
2. Manual -> 5-0-0 -> Manual. Channel 500 Displays.
3. PGM -> Trunk; select Mode until MOT appears
4. Press PGM. Channel 500 Displays.
5. Enter "857.93750,;" frequency is MOT (use mode), press "text" to key in a description of the channel, Press Enter, press PGM again. Channel 501 Displays.
6. Repeat sequence for "858.93750, 859.93750, 860.93750."
7. No maps or offets are needed as this is a 800Mhz trunk (look at frequencies).
TGIDs:
7. Press PGM -> Trunk. You should see Bank ??-?? On.
8. Scroll down using down arrow keys to Bank 00-00
9. From tables in RR Database key in the DEC Value. Press Enter
10. Press "text" and key in a description up to 12 characters. Press Enter to save
11. Use up arrow key and repeat for all TGIDs desired in trunk
12 Use FUNC + 7 to key in a bank description up to 12 characters.
13. During Scanning, what you keyed in will display during a comm.
14. Press "TRUNK" Key to hold a conversation, "Scan" to resume.

Read the documentation thoroughly and the Wiki pages. Good luck, Mike
 
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