Quote from Frasier in The Unnatural
Frasier: And this is the booth where it all happens. Frederick: Very impressive. Frasier: Well, this is the talk-back button here, if I want to talk to Roz. And this is the cough button if I want to mute the mike. Oh, and this button here's very special. It sends a death ray shooting from the phone of any caller who annoys me. Frederick: You wish. Frasier: Yes, I do.