To make a 3-way conference call to an outside caller and another handset in the house:

Press the “INT” button during your call with the outside caller
Scroll to the handset that you want
Press “Call”. Wait for the other person to answer you calls
Press “Conf”.
You are now on a 3-way conference call
Press "End" to end the conference call

n101688.asp Feb 25, 2007