K9WG,
The tones are used to set off station alerts, pagers, and even the fire sirens. Yes, each station has different tones, and officers also have seperate tones the county uses to page them for other things. All police and the coroners in the county can also be paged through the same type of setup.
Dispatch2323 - I haven't heard of any plans to go 800 with any department in the county. Not to say they won't though at some juncture. All trucks have 800 capability as do certain officers on each department. Some on scene comms between officers may be found on 800 on occasion.
One department - Fountaintown does use 800 often though, but thats due to the fact many of their calls are in Shelby Co. On occasion you will hear them call Hancock Co. on 800 to let them know they are responding to Shelby Co.