Two tone transmission prefix

[adked]

Hi,
When my village dispatch announces a new emergency call, there's a 2 tone audio song that starts the transmission (pager tones?)

Recently my village moved their initial dispatch call to a county wide dispatch frequency so I now hear songs and dispatch from every locality in the county. Subsequent transmissions are on the village frequency, so it's just the initial call that's on the county frequency.

Is there any way to get the radio to break squelch on the county frequency only when it hears the song for my village?


My radios: Radio Shack Pro-197 and Pro-107

 

[hazrat8990]

There isn't any way to filter out pager tones, unless there's a specific CTCSS tone, or NAC that is associated with your particular agency. Which agency, and where is it located?

 

[adked]

Franklin County NY Fire/EMS paging on 154.090. They don't seem to use a CTCSS tone or NAC on this frequency for the initial call. All additional communications for my village occur on 154.325 using 103.5 PL for both dispatch and fire or ems units.

This is a recent change. Everything used to be on 154.325 with a CTCSS but when the initial dispatch calls disappeared I found them on 154.090.

 

[hazrat8990]

I looked at the RR page, and even searched on the FCC's ULS website for a license using 154.090, and there isn't a single entity in NY licensed for that frequency. I do see Franklin County Emergency Services on 159.090 with a tone of 100.0Hz though.

 

[hazrat8990]

Curiosity got the best of me, so I expanded the search to all 50 states and US territories. There is only one licensee for that particular frequency.

 

[mmckenna]

154.090 is not a legit frequency in the Public Safety or Industrial frequency pool

Closest ones are 154.085 or 154.0925 and no license showing for those in the State of New York, that I can see.

 

[adked]

I"m sorry, typo, 159.090. On that frequency, I don't see any CTCSS tone being generated at all for any of the localities, just the audible 2 tone at the start initial dispatch call.

 

[hill]

Radio Shack scanners can't do fire paging using two tones, but many of the Uniden scanners can do fire tone out.

 

[adked]

That's great information, thanks very much! Maybe time to add a Uniden

 

[BinaryMode]

There's a software solution too.

Pager tone decoding

Dose anyone have a good pager tone decoding software they know of or i could barrow

forums.radioreference.com

 

[hill]

I have a few Uniden scanners in the stable, but really haven't played around with fire tone out. Many of local countries don't use it anymore with other ways to alert fire crews now.

Did have some set up on commercial Kenwood radios and it worked well. My TK-5210 paging channels don't work anymore with that county get rid of that system when built out the new P25 system.

 

[BinaryMode]

There might be a VHF frequency they still use. That's my case here and I've seen that in other areas. But there are newer systems that page now-a-days.

 

[adked]

There might be a VHF frequency they still use. That's my case here and I've seen that in other areas. But there are newer systems that page now-a-days.

That's a good idea, I think I'll run some search scans. Thanks for the tip!

 

[BinaryMode]

I'd first check the database here.

 

[adked]

I'd first check the database here.

I'll do that, thanks.