Making Sense of What You Hear- Part 2, by Hal2000
It would take thousands of words and dozens of illustrations to explain trunked radio systems. So, we will look at the thirty thousand foot level. What the communications industry did was to take lots of frequencies, lots of transmitters and receivers, and lots of computers to allow lots of users access to communications. They did what the cell phone industry did. For a large metropolitan area, they would build a dozen or so transmitter and receiver sites and connect them together with fiber optics and computers. This system would consist of anywhere from 5 to 35 frequencies, depending on the …