To begin a conference call, you will add a party to a call already in progress. There are three steps to accomplish this. First, while on a call, press the “Conference” button. Next either dial another party’s extension, phone number, or press the button corresponding to the desired extension on the screen. Once the second call is answered, press “Conference” again to join the two calls. For a detailed look at conference call features watch our video on that topic, linked below.