C Channel
I'm thinking that the freq is going to the in-put side of the repeater . Yr's ago the deputies would use the input side for a crime scene or at the cavlecade for security . I wouldn't bother a dispacher on this . You need to get a higher up to ask what the freq is . I bet digicom has it since the SO get's there radio's serviced by digicom . those radio's are maxtrac 16 ch so they had the freq programmed in .