Fire Tone-Out tone frequency question

[CountryRock2001]

Apologies if this isn't quite the right spot for this. I am looking at the page for fire tone-outs for my county (Oneida County (NY) Fire Tone Outs - The RadioReference Wiki) and I see some of the tones listed as a numeric Hz format and others are listed as a two letter code. What are these two-letter codes and can they be converted over to a numeric frequency?

 

[KE0SKN]

Look at the pic I uploaded. Code (A) or Tone (A) = Tone Collum 1. Code (B) or Tone (B) = Tone Collum 2. The Hz format is what the human ear can pick up. These are audible tones. Example 1:

County Car 271

346.7

1084.0

will look like this on the software to program the pager. See Pic 2 and the same codes can be entered in tone out on most newer scanners.

 

[a417]

What are these two-letter codes and can they be converted over to a numeric frequency?

He's looking to decode the letter pairs found in several of the linked pages listings. I don't think he's looking for how to take said information and dump it into a program.

I can't tell you with certainty what they decode to, but my original thought was they were Moto QC1 codes. After referring to this, i remembered that QC1's second letter is either A,B or Z...and I realized that I was wrong.

Maybe someone else here has better memory than I do.

 

[ofd8001]

This link may also provide some information: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwi_ooTo7qyAAxWQmmoFHaP6DDoQFnoECBgQAQ&url=https://www.sigidwiki.com/images/f/f3/Tone-signaling-charts.pdf&usg=AOvVaw3_-DZoqJ42GcQN6Iuh3S1b&opi=89978449

It will download a PDF showing conversions, such as LZ/HZ translating to 794.3/582.1

 

[a417]

This link may also provide some information: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwi_ooTo7qyAAxWQmmoFHaP6DDoQFnoECBgQAQ&url=https://www.sigidwiki.com/images/f/f3/Tone-signaling-charts.pdf&usg=AOvVaw3_-DZoqJ42GcQN6Iuh3S1b&opi=89978449

It will download a PDF showing conversions, such as LZ/HZ translating to 794.3/582.1

That's what I linked to as well.

There are no codes on that chart that decode to the information that the OP referenced to in the counties tone-out data. There are codes that end in F, G, K, etc that do not validly decode via that information.

 

[kf8yk]

The letter codes are indeed Quick Call 1. Quick Call 1 is similar to DTMF where the 'A' tone is a combination of two tones and the 'B' tone is also a combination of two tones.

With the old Motorola QC1 encoder the dispatcher would push the top row buttons with the first two letters then the bottom row with the last two letters. Here's a video of one in action:

What about the A, B and Z groups? When a customer ordered a QC1 encoder Motorola would fill it with reeds from one of these groups. The reason to have different groups was to prevent interference from another co-channel user also using QC1.

Looking at the Wiki we have Booneville FD with a QC1 code of HM NF. This decodes as:

602.6+912.0, 1011.6+489.8 (Group A)
or
623.7+944.1, 1047.1+507.0 (Group B)
or
582.1+881.0, 977.2+473.2 (Group Z)

Unfortunately the Wiki submitter did not indicate which group is in use so you have a 1 in 3 chance of getting it right.

 

[ofd8001]

The video kinda sounds like the old 2+2 format like what was used on the Emergency TV show (and other real life places).

There were also some Plectron receivers using the "-Z" tone format. Back when I got on the FD in 1974 I was issued a Plectron which had that LZ-HZ tone group. Most all of suburban Jefferson County KY was using the Plectron stuff. We did a big overhaul some 15 years ago and set everything up to be Motorola Quick Call II tones.