If necessity is the mother of invention, it may also be the secret to the success of Palmetto 800 (PAL 800), South Carolina's statewide emergency communications radio system. Founded in the early 1990s, the 800 MHz trunked network has grown into one of the nation's largest statewide systems, providing interoperable communications for more than 450 state, county and municipal agencies
http://www.govtech.com/gt/articles/749527
http://www.govtech.com/gt/articles/749527