ZONES
The other possibility is Zones 1- ........... The ABC thing is primarily because of the non display, top display 3 position switch on the radio. We use XTS 3000s, 3500s etc, and the zones are actually named. But the the model 1 radios have a template, with ABC since the zones are switched using this method. Depending on the settings thru RSS you can having differnet naming conventions.