Seems pretty simple to me, motorola type IIi hybrid and the programming fleet maps are there for rs and gre scanners. E1P2 and Uniden fleetmap preset 2. I would suggest this is a very old type system. I will check but the last post on this system is 3 years old. Maybe they have TRBO by now? The op did not provide what kind of scanner he is using to try and listen to this system?