CONTENTS

 1     Definition
 2     Description
        2.1     General description
        2.2     Specific terminology
        2.3     Qualification on the applicability to telecommunication services
 3     Procedures
        3.1     Provision/withdrawal
        3.2     Normal procedures
        3.3     Exceptional procedures
        3.4     Alternative procedures
 4     Network capabilities for charging
 5     Interworking considerations
        5.1     Interworking with non-ISDN networks
        5.2     Interworking with private ISDN
 6     Interaction with other supplementary services
        6.1     Advice of Charge (AOC)
        6.2     Call Hold (HOLD)
        6.3     Call transfer services (ECT, NCT)
        6.4     Call Waiting (CW)
        6.5     Closed User Group (CUG)
        6.6     Completion of calls services
        6.7     Conference services
        6.8     Diversion services
        6.9     Direct-Dialling-In (DDI)
       6.10     In-call Modification (IM)
       6.11     ISDN Freephone (IFS)
       6.12     Line Hunting (LH)
       6.13     Malicious Call Identification (MCID)
       6.14     Multi-level Precedence and Preemption (MLPP)
       6.15     Multiple Subscriber Number (MSN)
       6.16     Name identification services
       6.17     Number identification services
       6.18     Outgoing Call Barring (OCB)
       6.19     Reverse Charging (REV)
       6.20     Sub-addressing (SUB)
       6.21     Terminal Portability (TP)
       6.22     User-to-User Signalling (UUS)
 7     Dynamic description