 and free radiating, which allows you to have as much signal as you need within your campus perimeter. But when you get out to the edge of your perimeter, your signal strength has to be equivalent to what is dictated under 15209. So let's talk a little bit about that, actually. So you talk about carrier current is leaky coax, and carrier current is something we've talked about here on Radio Survivor before, but I think it's worth revisiting. Yeah, it's a wonderful radio technology that we need to know more about here.