A: I want to make a phone call. Can you show me how? B: Of course, pick up the receiver, hit a button and listen for a tone. Are you hearing it? A: Yes, now what do I do? B: Well, after you dial 9 on the keypad, you should hear the tone change. A: No, nothing changed. B: When you dial 9 and hear the tone change it means you have an outside line. Who are you trying to call? A: I am trying to call my boss. B: For an outside call you now just dial the number. For a company number you need to know the extension. Do you have a list of extensions? A: I know a few extensions but I don't know all of them. B: You can always look an extension up on the company website.