Patent ID: 7274675

Claim:
A method of distributing one or more participants of a conference handled by a first conference unit in a packet switched network, the method comprising: when a first condition is reached, a. locating a second conference unit satisfying a second condition, wherein locating the second conference unit is executed by sending an INVITE message with a Universal Resource Identifier (URI) indicating a new ad-hoc conference to a domain of current interest; b. reserving conference call capacity in said second conference unit, wherein when the second conference unit is located, the first conference unit starts transferring the one or more participants by: putting the one or more participants on hold, reguesting the second conference unit to invite the one or more participants to the second conference unit, and releasing the one or more participants from the first conference unit: c. transferring one or more of said participants from the first to the second conference unit, and d. entering said first conference unit as a participant in said second conference unit, wherein the conference units and the participants communicate according to a Session Initiation Protocol (SIP), and data streams of possible conference participants still attached to the first conference unit are mixed in the first conference unit and communicated as one data stream to the second conference unit.