A: Can you show me how to use this phone? B: Yes, I can help you with that. Pick up the receiver and hit one of the buttons. Do you hear a tone? A: No, I don't hear anything. B: Next you dial 9 on the keypad. You should hear the tone change. Did you hear it change? A: I'm not sure. B: OK. Well, after you get the line to change you have an outside line. Who are you trying to call? A: I am trying to call a client. B: To call a number on the outside you now just dial the number. For inside calls, punch in the extension number. Has someone given you an extension list? A: No, I don't know anyone's extension. B: All of the extensions are listed on the wall chart over there if you ever need help.