Pretty easy actually, the Ritron repeaters were designed with phone service in mind for off grid locations and they have a phone interface in them already. You can remove the phone interface and use the repeater like a normal repeater if you wanted to, but I did not remove them. So back to how it works.... Each repeater transmits and receives like a normal repeater and each of these transmits and receives on the others frequency and then the Baofeng Handheld has "dual watch" it can listen to one or both of the repeaters at the same time. The way those repeaters function with the phone card installed is if you lift the handset it will start transmitting and receiving immediately, and when the other repeater hears the squelch tone on it's receiving frequency it will make the phone plugged into it ring until you lift the handset, and at the same time the Baofeng will also receive the signal and squelch tone if you have it programmed to. Then if you use the Baofeng handheld to transmit to either of the 2 repeaters receiving frequencies and have the squelch tone programmed then that repeater will ring. If you know how a repeater functions it should be easy to understand what I just wrote, if you don't the above probably just sounds confusing. Anyways, I don't really have a use for it, I was just messing around to see what I could come up with. I do own a few off grid properties but we have cell service. Maybe it will come in handy if/when the shit hits the fan because these repeaters are 12 Volts. It is hard to see, but if you look right next to the 120v plug on the repeater, there is a small white 12v connector.
