In my area of the east coast, 'medic' is always paramedics. They are dispatched as 'Life Support 1', 'Life Support 2' etc., and they drive a paramedic car or SUV. The first responders are mainly EMT-B's, (though there may me a few EMT-A's thrown in) and they arrive in the ambulance. They are dispatched as 'Squad 10-9' 'Squad 23-1' etc, depending on what station they are based out of. After years of watching Emergency, I was thrilled the first time I heard a Squad dispatched!