Hello and Welcome to MyGMRS. GMRS repeaters are typically duplex, thus you would transmit on 467.xxxx and receive on 462.xxxx. NTT is 141.3 if I recall. Not sure how you would set up your radio. I guess the easiest way to set it up is to program it by computer, (which you should be doing to keep compliance of part 95) Each radio, even within the same brand, can have very different programming steps. You wont always hear the repeater when you key up unless you are listening with a second radio. Again, this varys by repeater model and the settings that were programmed. My repeater lets you hear a beep when you unkey, some have a tail, others just shut off as soon as you unkey