Know as a 3-way Local Conference, you can talk with two other people in a conference setting.
Add Another Person to a Call
From an active call, press the [Conference Button].
Dial the 2nd party which once answered will be added to the conference
You will now see both numbers on the screen.
Split the two parties from a conference call
You can return to individual calls for each party by the following:
Press the [Split] softkey to split the conference parties into two individual calls.