This paper treats the usefulness of 3D visual component based approach for effective telepresence systems. The research group of the author has already proposed a 3D visual component based software development system called IntelligentBox. IntelligentBox has provided various software components called boxes, which are 3D visible, reactive objects. IntelligentBox has also provided a particular box called RoomBox, which enables to build distributed 3D graphics applications easily and rapidly. For effective, practical collaborative virtual environments, the communication of voice and face-to-face is strongly necessary. In this paper, the author especially explains a 3D component based video transmission functionality of IntellgentBox and a voice communication functionality introduced into IntelligentBox for the development of effective telepresence systems.