I was reading up on Columbia Co radio system and see it is analog? I am able to monitor their dispatch and talk groups (duplex frequencies) with a Baofeng UV-5R. I am curious as to what sort of system they use and how it works. Is there a term that explains this? I am only wondering in comparison to Dauphin County (my home county) which uses Motorola Astro P25 Phase I Digital UHF.