Hopefully those on the list can answer a few questions about getting app_rpt setup and what is really required. 1. why is the arib needed and what exactly does it do? 2. Why do I need 2 fxs ports for full duplex operation? my phone is full duplex when plugged into the same port why can't the audio for the radio be? Come to think of it I can buy a little phone with a headset jack for next to nothing and have seperate tx (mike) and rx (speaker) audio. this just takes a 2 to 4 wire hybrid common to most phones. why do I need the arib at all? 3. Why do I need the arib at all? 4. is the rbi-1 really needed? what function does it serve? I've seen mention of using an ft-897 directly without it. How is this done? why hf only for the 897 when the 897 covers hf, 6m, 2m, and 440? 5. what about interfacing other radios used for repeaters such as micor, maxtrack, etc. Thanks, Eric - kg6kqt