Shouldn't be too hard to fix seeing as how Dallas is on a 700MHz P25
network. I'm sure there are P25-based controller upgrade/swap-in kits
from siren mfgs. I believe that's what they did here in my neck of the
corn. Either that or cellular. All of the DTMF and/or FSK via RF
activated sirens are gone as of 5-6 years ago. Apparently not in Dallas.
On 4/9/2017 4:52 AM, Colin Stanners wrote:
If it's an old system, it's very possible there's nothing desirable
like authentication/encryption - it may just be "turn on the sirens if
you see any signal on the frequency of 155.555mhz" Anyone with some RF
knowledge, a $300 SDR (HackRF One) and a $50 amateur radio flea market
"2 meter band" amplifier could blanket a city with such a signal.
On Sun, Apr 9, 2017 at 1:15 AM, CBB - Jay Fuller
<[email protected] <mailto:[email protected]>> wrote:
Sirens are bad right ?
Create a custom radio on a certain frequency? I am sure these
things are set off with a radio right....
https://www.usatoday.com/story/news/2017/04/08/hacker-triggers-all-156-emergency-sirens-dallas/100212412/
<https://www.usatoday.com/story/news/2017/04/08/hacker-triggers-all-156-emergency-sirens-dallas/100212412/>
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