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  #1 (permalink)  
Old 12-22-2006, 5:58 AM
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Default NAC Codes?

Does anyone have a list of NAC codes? Thanks!
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Old 12-22-2006, 6:41 AM
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Quote:
Originally Posted by denseglow
Does anyone have a list of NAC codes? Thanks!
APCO25 NAC Codes range hexadecimal : $000 -$FFF.
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Old 12-22-2006, 6:56 AM
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Quote:
Originally Posted by 10-95
APCO25 NAC Codes range hexadecimal : $000 -$FFF.
No, he wanted a list!
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Old 12-22-2006, 7:21 AM
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I didn't mean an extensive one by one list, that would obviously be quite long. I was just curious as to how they were formed. Thanks
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Old 12-22-2006, 8:12 AM
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Default PL to NAC Code Plan

Not sure if anyone has ever followed this little plan, but here the APCO people suggest the following NAC codes for PL tones.

I've never found if any agency who uses mix-mode or who use to use analog and is now digital uses this plan or not.
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Old 12-22-2006, 8:21 AM
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Quote:
Originally Posted by NeFire242
Not sure if anyone has ever followed this little plan, but here the APCO people suggest the following NAC codes for PL tones.

I've never found if any agency who uses mix-mode or who use to use analog and is now digital uses this plan or not.
Not an APCO document and obsolete.
-----------------------------------------
CTCSS to NAC Conversion
Early TIA documents specifi ed a formula for converting analog CTCSS
tones and DCS codes to specifi c NAC codes. Those documents have
since been removed and the selection of NAC codes has been left
to the user. Some government agencies have defi ned a conversion
table for their own use for translating CTCSS to NAC codes (eg. State
of California and others).
Shown below is the early TIA conversion table from CTCSS to
NAC codes. These codes were determined by taking the CTCSS
frequency and multiplying it by ten, then converting the integer result
to a hexadecimal number.
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Old 12-24-2006, 12:23 PM
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Quote:
Originally Posted by N_Jay
No, he wanted a list!
He needs to grab a pen and paper, start at $000 and work up to $FFF and he'l have a list. You might be surprised at how many agencys
actually use 293 as theiR NAC in conevtional mode.
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Last edited by 10-95; 12-24-2006 at 2:11 PM..
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Old 12-24-2006, 2:34 PM
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Quote:
Originally Posted by 10-95
He needs to grab a pen and paper, start at $000 and work up to $FFF and he'l have a list. You might be surprised at how many agencys
actually use 293 as theiR NAC in conevtional mode.
We can do it in Excel faster.
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Old 12-24-2006, 4:45 PM
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According to my calculations, there are 4,095 different NAC codes.
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Old 12-24-2006, 5:18 PM
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What is the NAC for open carrier...$F7F or $F7E ?
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Old 12-24-2006, 5:36 PM
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Quote:
Originally Posted by e911god
What is the NAC for open carrier...$F7F or $F7E ?
Thats funny. The info is in the same Daniels Electronic document quoted by NJay above (in the page just before).

F7E is for subscriber units (will accept any NAC).
F7F is for repeaters (will accept and pass-thru any NAC).

Seeing either of these actually transmitted is probably a misconfiguration.

-rick
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Old 12-25-2006, 12:46 AM
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Are most digital repeaters out of the box set to $293? That has pretty much been the norm NAC for P25 ham systems.
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Old 12-25-2006, 12:43 PM
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Quote:
Originally Posted by e911god
Are most digital repeaters out of the box set to $293? That has pretty much been the norm NAC for P25 ham systems.

That's the usual default for new P25 products from Motorola.
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Old 12-25-2006, 6:09 PM
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Quote:
Originally Posted by e911god
What is the NAC for open carrier...$F7F or $F7E ?
This is right out of Motorola documentation:

Quote:
293 Default NAC code for Motorola subscribers

F7E Receiver unsquelch on any incoming NAC (aka Digital Carrier Squelch)
Mobile, Portable, Repeater or Base

F7F Repeater will pass the incoming NAC transparently and TX the same NAC.
Repeater Only
My Quantar is set for F7E and by default transmits 293 and there is no way to change it.
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Old 01-03-2007, 11:19 AM
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So how would one find the NAC codes for let's say the atf or other similar agencies?

Or how would you find the NAC codes for local public safety VHF or UHF?

I can see where DPS in Texas has some use of NAC codes but how do you find some of these without having to search out almost 5,000 possibilities?

Thanx....
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Old 01-03-2007, 11:33 AM
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Quote:
Originally Posted by KS4VT
This is right out of Motorola documentation:



My Quantar is set for F7E and by default transmits 293 and there is no way to change it.

Why?

I thought you could reprogram those with Quantar RSS.
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Old 01-03-2007, 11:41 AM
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It is hard coded with CPS version 13 and above to default to 293 when Digital Carrier Squelch (DCS) is enabled in the Access Code Table.

I didn't write the software, I just use it.
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Old 01-03-2007, 12:57 PM
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Quote:
Originally Posted by remod
....I can see where DPS in Texas has some use of NAC codes but how do you find some of these without having to search out almost 5,000 possibilities?

Thanx....
Check the RR Trunker/decoder forum. There is a thread on NAC decoding.

Wayne
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