1. A method for conducting a conference using a virtual meeting room server managed by a third party, comprising: allocating a dial-in number to the third party, wherein the dial-in number provides connectivity to a virtual meeting room and is associated with a profile defining capabilities of the virtual meeting room; receiving calls from callers to the dial-in number to start or join a conference in the virtual meeting room; in response to each received call, determining at the virtual meeting room server whether the caller can be connected to the virtual meeting room; and if the caller can be connected, connecting the caller to the virtual meeting room.