Game control and communication

As a first year guy, I am obviously still learning many of the facets of officiating. However, I have noticed that two aspects of my "game" are lagging behind. I am pretty good calling plays, and my mechanics are good. However, my "game control" and communication skills seem to need work. I had an observer say I need to use my voice to control the game. 1. What does this look like? Also, I hear a lot from my partner about how "this coach said such and such". The thing is, I rarely talk to a coach. During free throws (2 man) I am not near the bench, so I don't talk to the coach then. 2. When (and how) during the game should I interact with the coach? I listen when I make a bad call and the coach asks me about it, but that's about it. I guess I also want to know how to get more positive interaction with coaches, instead of just interacting with them in negative circumstances.