CONTENTS

 1     User-to-User Signalling (UUS)
        1.1     Definition
        1.2     Description
                  1.2.1     General description
                  1.2.2     Specific terminology
                  1.2.3     Qualifications on the applicability to telecommunications services
                  1.2.4     State definitions
        1.3     Operational requirements
                  1.3.1     Provision/withdrawal
                  1.3.2     Requirements on the originating network side
                  1.3.3     Requirements in the network
                  1.3.4     Requirements on the terminating network side
                  1.3.5     Assumptions made about the terminal
        1.4     Coding requirements
                  1.4.1     Messages
                  1.4.2     Codesets
                  1.4.3     Information elements
                  1.4.4     Codepoints
        1.5     Signalling requirements
                  1.5.1     Activation/deactivation/registration
                  1.5.2     Invocation and operation
        1.6     Interaction with other supplementary services
                  1.6.1     Call Waiting
                  1.6.2     Call Transfer
                  1.6.3     Connected Line Identification Presentation
                  1.6.4     Connected Line Identification Restriction
                  1.6.5     Calling Line Identification Presentation
                  1.6.6     Calling Line Identification Restriction
                  1.6.7     Closed User Group
                  1.6.8     Conference Calling
                  1.6.9     Direct-Dialling-In
                 1.6.10     Call diversion (call forwarding) services
                 1.6.11     Line Hunting
                 1.6.12     Three-Party Service
                 1.6.13     User-to-User Signalling
                 1.6.14     Multiple Subscriber Number
                 1.6.15     Call Hold
                 1.6.16     Advice of Charge
                 1.6.17     Sub-addressing
                 1.6.18     Terminal Portability
                 1.6.19     Completion of Calls to Busy Subscriber
                 1.6.20     Malicious Call Identification
                 1.6.21     Reverse Charging
                 1.6.22     Multi-Level Precedence and Preemption
        1.7     Interactions with other networks
                  1.7.1     Interaction with non-ISDNs
                  1.7.2     Procedures for interworking with private ISDNs
        1.8     Signalling flow
        1.9     Parameter values (timers)
       1.10     Dynamic description (SDLs)
References