DTMF tones used to activate tornado sirens

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Uploaded by: brycey wicey

Upload date: 1/29/2025

Description:

These are the DTMF tones used to control the tornado sirens here in Columbus Ohio, in Franklin County. They still use DTMF paging. The frequency is 158.925 MHz. The signal is pretty strong where I am. The radio used is the Baofeng BF-F8hp pro 8W radio. Wish I could record using line-in source so I wouldn't have to use my phone but it only has a mic jack.

So theoretically... Anyone, given access to that frequency and the correct sequence to put into a DTMF tone generator... Could just set off the sirens? That doesn't sound very secure.

you could always get a pickup coil and record that way

Cool what does the first tone do?

Yes, it could be true. If somebody had the right frequency and broadcasted that they could probably do so. I'm about a mile from the siren , so it might set that one and the ones  nearby.

I'm not sure what the first tone does. The first one might tell how long to go off. The second tones activate them. There are tones that can rotate them, and deactivate them. You also have tones to turning on the Pa system to talk, though they do that the first of the month.