If he is saying that they are not permitted to call into talk radio programs, sports talk programs, radio contests, etc. during work hours, then I see nothing wrong with that. They should be doing what they're getting paid to do during those hours. If he is saying they are not allowed to do this, period, then that's another matter.
RE: . If he is saying they are not allowed to do this, period, then that’s another matter.
I believe he means the latter.