Patent ID: 7154864

Claim:
A method for use by a caller terminal in setting up a conference call for a voice call or messaging session to a callee terminal, the caller terminal subscribed to a component of a communication network including a conference server functioning as a signaling node for the conference call, the communication network using session initiation protocol signaling for call set up, the method comprising the caller terminal signaling according to session initiation protocol a call setup communication to the callee terminal either via the conference server or directly, the caller terminal including in the call set up communication an indication that the call being set up is a conference call and also including in the call setup communication either a group document indicating possible participants in the conference call or a reference to the group document, wherein if the caller terminal provides the call setup communication to the callee terminal via the conference server then the conference server communicates to the callee terminal either the group document or a reference to the group document.