CONTENTS

 1     Scope
 2     References
 3     Definition of terms
        3.1     Terms defined in ITU-T F.851 [2]
        3.2     Terms defined in this Recommendation
                  3.2.1     General terms
                  3.2.2     Specific terms
 4     Glossary of abbreviations
 5     Description of UPT
 6     General requirements
        6.1     General principles
        6.2     Key network functionalities
        6.3     Network transport of identities
 7     Requirements on UPT networks
        7.1     Scope of interworking
                  7.1.1     CS-1-based
                  7.1.2     CS-2-based
        7.2     Functional architecture for interworking
                  7.2.1     CS-1-based
                  7.2.2     CS-2-based
        7.3    Interworking - Requirements
                  7.3.1     CS-1-based
                  7.3.2     Compatibility requirements between CS-1 and CS-2
                  7.3.3     Scenario 1
                  7.3.4     Scenario 2
                  7.3.5     Scenario 3
                  7.3.6     Scenario 4
                  7.3.7     Future requirements
 8     Requirements on the local exchanges
        8.1     Originating local exchanges
        8.2     Terminating local exchanges
 9     Requirements on the transit exchanges
        9.1     National exchanges
        9.2     International switching exchanges
10     Feature interactions
       10.1     UPT feature set
                 10.1.1     Essential UPT features
                 10.1.2     Optional UPT features
                 10.1.3     UPT Supplementary Services
       10.2     Feature interactions between UPT and PSTN/ISDN features
11     Interworking - Requirements on IN
       11.1     Transport of parameters required for UPT services
12     Requirements on network signalling
       12.1     UPT calls versus non-UPT calls
       12.2     Transport of parameters required for UPT services
                 12.2.1     Transport of UPT service indicators
13     Requirements on access signalling
       13.1     Transport of parameters required for UPT services
       13.2     Requirements on DSS1
       13.3     Requirements for Information Flows