US Patent 7577109 Method and apparatus for selecting user data

A method selects user data that is transmitted between a calling user and at least one called user via at least one telecommunication network before call establishing is complete. The calling user uses a called user's reception address data contained in a reply message of a called user to select user data sent by the called user with a transmission address of said called user, a called user's reception address data of a call destination also representing transmission address data of said called user.