CONTENTS

 1     User-to-User Signalling (UUS)
        1.1     Scope
        1.2     References
        1.3     Definitions
        1.4     Abbreviations
        1.5     Description
        1.6     Operational requirements
        1.7     State definitions
        1.8     Coding Requirements
        1.9     Signalling procedures at the coincident S_B and T_B reference point
       1.10     Procedures for interworking with private networks
       1.11     Interworking with other networks
       1.12     Interaction with other supplementary services
       1.13     Parameter values (timers)
       1.14     Dynamic description (SDLs)
Appendix I – Signalling flows
Appendix II – Instruction indicators