Can anybody educate me on these systems more than the wikis show? Like the process of building these systems, managing, the required amount of frequencies to function (input and output), control channels, modes, and systems that could work with it, pseudo trunking, and more? The reason I ask is that I plan to dive head-first into these organized systems, I want to know exactly how they work, and someday I would like to be able to implement one for one of my friend's business. I have never used or worked on one of these things before nor have the equipment yet.