Also don't be surprised if a particular agency has one or more tac channels programmed in their radio that aren't on the trunked system. Heck, they don't even have to be on 450 mhz [depending upon what radios they are using]. I'm aware of at least one fire agency on SIRN that has some conventional TAC [and other] channels in their radios, along with their SIRN talkgroups.
Mike / AA8IA
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