I guess what I really meant to say is that the portable radio I have Motorola HT750 has a feature where when the tone drops for the individual station or fire department the radio picks it up than does 4 loud beeps and than you hear the dispatch, so my best guess is that there has to be a freq. for each individual stations tone. the radio pretty much acts as a pager Here's an example of what I mean
Oh! You mean the tone-out frequencies. Well, if you belong to one of those agencies, they can program the radio for you. I know my BC396T scanner has that, though I am not exactly sure where to access that info. Also, if your radio does CTCSS, you can program the CTCSS code for that frequency (I think it's 192.8 PL) and all the tones will drop. So for each dispatch you will only hear the voice dispatch.