Determining Tone A and Tone B

Maxagonzales

Member
Premium Subscriber
Joined
Jul 5, 2019
Messages
56
Location
Tucson
Hi everyone,

I’m reaching out to see if anyone here might be able to assist me with identifying the two-tone alert tones (Tone A and Tone B) used by the Rural/Metro Fire Department in the Tucson, Arizona area. I’ve attached an audio clip that contains what I believe is the actual alerting tones used during dispatch, and I’m hoping someone with the right tools or experience can help me determine the exact frequencies.

Unfortunately, I don’t have the decoding equipment necessary to analyze the tones myself. I’m relatively new to working with pagers and two-tone alerting, and I don’t currently have access to a decoder or software that can accurately read and measure these tones from the audio. What I do have is a Unication G5 pager, and my goal is to program it so that I can receive and monitor Rural/Metro dispatches properly.

If anyone is familiar with the tone pairs Rural/Metro uses, or if you’re able to analyze the audio and determine the tone frequencies, I would be extremely grateful for your help. Even just pointing me in the right direction would be appreciated.

Additionally, I’d be interested to know if there’s a known VHF frequency or channel that Rural/Metro Fire typically uses for dispatch or fireground operations. I’ve been researching online and scanning local frequencies, but I haven’t been able to confidently identify which ones are active for this department.

If it helps, I’m located in the Tucson area, so this is specific to Southern Arizona operations – not Phoenix or Maricopa County.

Thank you in advance to anyone who can offer advice, guidance, or technical assistance. I know this community has a wealth of knowledge, and I appreciate the time you take to help folks like me get started and get set up properly.

Looking forward to hearing from you.

– Max
 

RaleighGuy

Member
Premium Subscriber
Joined
Jul 15, 2014
Messages
16,554
Location
Raleigh, NC
Unfortunately, I don’t have the decoding equipment necessary to analyze the tones myself. I’m relatively new to working with pagers and two-tone alerting, and I don’t currently have access to a decoder or software that can accurately read and measure these tones from the audio. What I do have is a Unication G5 pager, and my goal is to program it so that I can receive and monitor Rural/Metro dispatches properly.

If you have a G5 with new FW and PPS you have the tools, look in the menus for TONE DETECT and it will decode the tones for you.
 

cmjonesinc

Member
Premium Subscriber
Joined
Apr 25, 2011
Messages
1,478
can i do this on a trunked system or does this have to be VHF for tone detection
My area still tones out over analog with just voice over a digital trunked system. I don't think you'll be able to detect a tone that's been digitized but I'm not certain on that. I don't have any experience with tones over a digital trunked system.
 
Top