CONTENTS

 1     Scope
 2     Normative references
 3     Definitions and symbols
        3.1     Definitions
        3.2     Symbols
 4     Abbreviations
 5     General
        5.1     Application of this Recommendation
                  5.1.1     Intercommunication of Audiovisual equipments
                  5.1.2     Intercommunication of non-audiovisual equipments – Case D
        5.2     Definition of the Modes of transmission on the MC side
        5.3     General description of the aggregation process
        5.4     CAU functionality
 6     Choice of H.244 or ISO aggregation
 7     H.244 aggregation procedure
        7.1     Call control
                  7.1.1     Initial channel
                  7.1.2     Additional channels
        7.2     Channel synchronisation
        7.3     In-band procedure using H.221 BAS codes
                  7.3.1     Control of transfer rate
                  7.3.2     Determination of the transfer-rate capabilities to be transmitted on the MC side
                  7.3.3     Determination of the transfer-rate capabilities to be transmitted on the SC side
                  7.3.4     Capability sets transmitted from a CAU
                  7.3.5     Notification of change of Na
                  7.3.6     Commands transmitted from a CAU
        7.4     Transmission of user information by a CAU
 8     Initialisation, Mode/Rate changing and Fault recovery
        8.1     Initialisation
                  8.1.1     Single-channel Side
                  8.1.2     Multi-channel Side, initial channel
                  8.1.3     Multi-channel Side, additional channels
        8.2     Change of transmission rate during a session
        8.3     Recovery from fault conditions
        8.4     Further mode changes
 9     ISO aggregation procedure
Appendix I – Examples of procedures
Appendix II – Example of SDL diagram for TAC initialisation
Appendix III – Comments on the modification of capsets and commands