CONTENTS

 0     Generic service description
 1     Call Forwarding service
        1.1     Definition
        1.2     Specific terminology
        1.3     Service description
        1.4     Operation of the service from the users' perspectives
                  1.4.1     Calling party
                  1.4.2     Called party
                  1.4.3     Forwarded-to party
        1.5     Implementation considerations
 2     Call Hold service
        2.1     Definition
        2.2     Specific terminology
        2.3     Service description
        2.4     Operation of the service from the users' perspectives
                  2.4.1     Served user
                  2.4.2     Held user
        2.5     Implementation considerations
 3     Call Waiting supplementary service
        3.1     Definition
        3.2     Specific terminology
        3.3     Service description
        3.4     Operation of the service from the users' perspectives
                  3.4.1     User A
                  3.4.2     User C and user B
        3.5     Implementation considerations
 4     Calling Line Information service
        4.1     Definition
        4.2     Specific terminology
        4.3     Service description
        4.4     Operation of the service from the users' perspectives
                  4.4.1     Calling party
                  4.4.2     Called party
        4.5     Implementation considerations
 5     Calling Name Information Service
        5.1     Definition
        5.2     Specific terminology
        5.3     Service description
        5.4     Operation of the service from the users' perspectives
                  5.4.1     Calling party
                  5.4.2     Called party
        5.5     Implementation considerations
 6     Conference call, meet-me
        6.1     Definition
        6.2     Specific terminology
        6.3     Service description
        6.4     Operation of the service from the users' perspectives
                  6.4.1     Served user
                  6.4.2     Participants
                  6.4.3     Service provider
        6.5     Implementation considerations
 7     Explicit Call Transfer service
        7.1     Definition
        7.2     Specific terminology
        7.3     Service description
        7.4     Operation of the service from the users' perspectives
                  7.4.1     Served user
                  7.4.2     Users B and C
        7.5     Implementation considerations
 8     Multi-level Precedence and Preemption Service
        8.1     Definition
        8.2     Specific terminology
        8.3     Service description
        8.4     Operation of the service from the users' perspectives
                  8.4.1     Calling party
                  8.4.2     Called party
        8.5     Implementation considerations
 9     Reverse Charging (REV) supplementary service
        9.1     Definition
        9.2     Specific terminology
        9.3     Service description
        9.4     Operation of the service from the user's perspective
                  9.4.1     Calling Party
                  9.4.2     Called Party
        9.5     Implementation considerations
10     Three-party service
       10.1     Definition
       10.2     Specific terminology
       10.3     Service description
       10.4     Operation of the service from the users' perspectives
                 10.4.1     Served user
                 10.4.2     Remote parties
       10.5     Implementation considerations
Appendix I – Informative references