How Far Can They Go ????? offensive coordinator/quarterback?

Question

i mean, after they send in the play.........can they keep talking ??
like "look out, there's a guy comin' at from the left" or " throw it to # 89, he's free", or "are ya o.k. ? do you wanna time-out"??
or ( i hate to even think of this one), " the word came down.....you gotta throw this game!"
OR, is there someone listening to the conversations, and cuts them off if they get into illegal areas. (maybe that's what "official time-outs" are all about)??
OR, com'on give me some answers.

Answer 1

they can say anything they want. most of the time when you see a quarterback pointing, they dont know what they are pointing at they are just following orders from the headset