ller Device Control T.SHARE T.127 T.132/133-Audio T.126 Visual Control T.122/123/T.MT/T.124/T.125 Data Management Infrastructure Network Multiplex Figure 8-2. The T-120 Family of Recommendations (Laura Long). T.124 The formal title of the T.124 Recommendation is Generic Conference Control. T.124 provides a high-level framework for conference management and control. Generic conference control functions provide tools for the establishment and termination of Standards for Audiographic Conferencing sessions and the coordination of conference management. They also allow oversight of the nodes that are participating in a conference, and provide a registration directory to track them. A portion of the specification is devoted to managing the roster of application capabilities and the Application Protocol Entities that support them. The services addressed by T.124 include: Conference establishment and termination Managing the conference roster Managing the application roster Application registry services Conference conductorship Miscellaneous functions T.125 The formal title of the T.125 Recommendation is Multipoint Communication Service Protocol. T.125 defines a protocol that operates across layers of multipoint communication hierarchy. It specifies the format of messages that are passed between T.125 entities, and procedures that govern their exchange over a set of transport connections. The purpose of T.125 is to implement the services defined by ITU-T Rec. T.122. T.126 The formal title of the T.126 Recommendation is Multipoint Still Image and Annotation Protocol. T.126 defines the protocol to be used by a wide array of user applications that require the exchange of graphical information in a heterogeneous (multi-vendor) environment. Applications include the annotation and exchange of still images, simple whiteboarding, screen sharing, and remote computer application piloting. T.126 uses services provided by T.122 and T.124. The T.126 protocol permits conference-wide synchronization of multi-plane/multi- view graphica