CONTENTS

 1     Scope
 2     References
 3     Terms and definitions
 4     Abbreviations and acronyms
 5     Description
 6     Messages and information elements
 7     Procedures
        7.1     Actions at the served endpoint B
                  7.1.1     Normal procedures
                  7.1.2     Exceptional procedures
        7.2     Actions at the calling endpoint C
        7.3     Gatekeeper actions
 8     Interworking considerations
        8.1     Interworking with SCN
        8.2     Interworking with other supplementary services
                  8.2.1     Call Diversion (H.450.3)
                  8.2.2     Call Hold (H.450.4)
                  8.2.3     Call Park and Call Pickup (H.450.5)
 9     Dynamic description
        9.1     Operational models and signalling flows for SS-CW
        9.2     Communication between Served endpoint and Served endpoint User
                  9.2.1     Table of primitives
                  9.2.2     Primitive definition
                  9.2.3     Parameter definition
                  9.2.4     Call states
        9.3     Communication between Calling endpoint and Calling endpoint User
                  9.3.1     Table of primitives
                  9.3.2     Primitive definition
                  9.3.3     Parameter definition
                  9.3.4     Call states
        9.4     Timers
10     ASN.1 Operations in support of SS-Call Waiting
11     Specification and Description Language (SDL) Diagrams
       11.1     Served endpoint SDLs
       11.2     Calling endpoint SDLs