Conference Calling  
To originate or set up a conference call:
While on an active call, press the More soft key to show the Conference soft 
key
Press the Conference soft key, the active call is automatically placed on hold
Dial the number of the person you want to add to the conference call  
Press the More soft key and then press the Conference soft key to add the 
person to the conference
Polycom Note: The originator of the call CAN hang up without disconnecting 
the remaining parties