The first caller is placed on hold. Dial the number of the caller you wish to add to the conference call and press "Send" on the touchscreen.
When the called party answers, press "Conference" on the touchscreen. The call will be added to the conference.
While in a conference call you can do the following:
Press the "Split" soft key to split the conference into two individual calls.
Press the "Hold" soft key to place the conference on hold.
Press "Manage" soft key to remove or mute individual participants. Select the call with the arrow keys and press "Farmute" to mute that person from talking in the conference call or press "Remove" to remove the person from that call.
Press "End Call" on the touchscreen, or the "Cancel" soft key to end the conference call.
A conference with up to three participants (yourself and two others) can be made using this procedure.