Call-box vs. 'Tac 2'
I watched an episode of Adam-12 today in which the dispatcher tells Adam-12 to call the station (can't remember exact wording). So they stopped at a call-box and Reed talked to Mac. They don't often use the call-boxes... more often they get a request "1-Adam-12, meet 1-L-20 on Tac 2." At first one might guess that when this happens, Mac is in his "L-car," so using Tac 2 would mean they're calling car-to-car. But I don't think that's the case; I think most times (unless they're in the middle of a 'caper') when they talk to Mac on Tac 2, he's at the station.
So that made me curious about when they would use the call-box and when (more frequently) they'd use Tac 2.