Brandenatsignal
Newbie
Doing some work for my city on a storm siren and need to understand better how 2-tone works. I'm also a volunteer firefighter and have been in the electronics/communications industry in various capacities for almost 20 years. To my knowledge the activation of systems from 2-tone is similar to the DTMF decoder boards. I'm looking for something that can decode at least two, preferably four different 2-tone calls to activate different relays. I've only been able to find DTMF boards like this and don't know if those will work. Anyone have any thoughts?