Call Waiting If you are already on an incoming or outgoing phone call, you will hear a tone that tells you that another call is coming in; the tone is repeated in about 10 seconds if you do not answer the call right away. To Use: When your hear a beep, press the receiver button quickly, or if your phone has the Flash button press "Flash" and this will transfer you to your incoming phone call while the other party holds. (Tone Block: If you do not want to be notified of a call by the Call Waiting beep during a particular call or when using a fax or modem dial *70 (rotary phone 1170)): Listen for the dial tone Make your outgoing call Tone block is turned off when you complete your call