Thanks, Evan. During monitoring this afternoon, all I saw for Cherokee Co Fire dispatch was 123.0 Hz.
I also did a quick check of other Cherokee Counties in the U.S., and didn't find any others using 154.400 MHz. I thought maybe the information had been misdirected.
For what it's worth, Monroe County, Tn Fire (between Chattanooga and Knoxville) reportedly uses 154.400 / 71.9 R (according to Larry Van Horn / Monitoring Times). That's likely the closest source for that frequency and tone.
Jeff