Placing Call Internal and External

To place an external call, pick up the receiver or press Speaker or Headset and dial the
number. The number must include 1+the area code.  You can also redial a number or select a number from the call history. It might be necessary to modify a number selected from a call history list so that the phone will dial it correctly.

You don’t need to press the speaker phone button before you dial out. They did this on the video so you could hear the call.

To place an internal call, pick up the receiver or press Speaker or Headset and dial the
extension number of the person.