CONTENTS

 1     General
        1.1     Scope
        1.2     General considerations
                  1.2.1     Service definitions
                  1.2.2     Network Transport of Identities
                  1.2.3     Interactions
                  1.2.4     References
        1.3     Definitions and terminology
 2     Summary Service Definitions
        2.1     UPT specific supplementary services
        2.2     UPT modification of ISDN service Recommendations
        2.3     Definitions of supplementary services adopted from the I-series Recommendations
 3     Description of interactions of supplementary services in the UPT environment and line owner's supplementary services
        3.1     Call Waiting (CW) – Interactions between line owner's and UPT user's supplementary services
        3.2     Call Forwarding Busy (CFB) – Interactions between line owner's and UPT user's supplementary services
        3.3     Calling Line Identification Presentation/Calling Line Identification Restriction (CLIP/CLIR) – Interactions between line owner's and UPT user's supplementary services
        3.4     Connected Line Identification Presentation/Connected Line Identification Restriction (COLP/COLR) – Interactions between line owner's and UPT user's supplementary services
        3.5     Completion of Calls to Busy Subscriber (CCBS) – Interactions between line owner's and UPT user's supplementary services
        3.6     Multi-Level Precedence and Pre-emption (MLPP) – Interactions between line owner's and UPT user's supplementary services
        3.7     Explicit Call Transfer (ECT) – Interactions between line owner's and UPT user's supplementary services
        3.8     Interaction between supplementary services in the UPT environment