CONTENTS

 1     Definition
 2     Description
        2.1     General description
        2.2     Specific terminology
        2.3     Applicability to telecommunication services
 3     Procedures
        3.1     Provision/withdrawal
        3.2     Normal procedures
        3.3     Exceptional procedures
 4     Network capabilities for charging
 5     Interworking requirements
        5.1     Interworking with non-ISDN networks
        5.2     Interworking with private ISDNs
 6     Interaction with other supplementary services
        6.1     Advice of charge services
        6.2     Call hold (HOLD)
        6.3     Call transfer
        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 Service (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     Support of Private Numbering Plans (SPNP)
       6.22     Terminal Portability (TP)
       6.23     User-to-User signalling (UUS)