CONTENTS

 1     Definition
 2     Description
        2.1     General description
        2.2     Specific terminology
        2.3     Qualifications on the applicability to telecommunication services
 3     Procedures
        3.1     Provision/withdrawal
        3.2     Normal procedures
                  3.2.1     Activation/deactivation/registration
                  3.2.2     Erasure
                  3.2.3     Invocation and operation
                  3.2.4     Interrogation
        3.3     Exceptional procedures
                  3.3.1     Activation/deactivation/registration
                  3.3.2     Erasure
                  3.3.3     Invocation and operation
                  3.3.4     Interrogation
        3.4     Alternate procedures
                  3.4.1     Activation/deactivation/registration
                  3.4.2     Invocation and operation
 4     Network capabilities for charging
 5     lnterworking considerations
        5.1     lnterworking with non-ISDNs
        5.2     lnterworking with private ISDNs
 6     Interaction with other supplementary services
        6.1     Advice of charge services
                  6.1.1     Charging information at call set-up time (AOC-S)
                  6.1.2     Charging information during the call (AOC-D)
                  6.1.3     Charging information at the end of the call (AOC-E)
        6.2     Call hold (HOLD)
        6.3     Call transfer
                  6.3.1     Explicit Call Transfer (ECT)
                  6.3.2     Normal Call Transfer (NCT)
        6.4     Call Waiting (CW)
        6.5     Closed User Group (CUG)
        6.6     Completion of calls services
                  6.6.1     Completion of Calls on No Reply (CCNR)
                  6.6.2     Completion of Calls to Busy Subscribers (CCBSs)
        6.7     Conference services
                  6.7.1     Conference calling (CONF)
                  6.7.2     Meet-Me Conference (MMC)
                  6.7.3     Preset Conference Calling (PCC)
                  6.7.4     Three-Party Service (3PTY)
        6.8     Diversion services
                  6.8.1     Call Deflection (CD)
                  6.8.2     Call Forwarding Busy (CFB)
                  6.8.3     Call Forwarding No Reply (CFNR)
                  6.8.4     Call Forwarding Unconditional (CFU)
                  6.8.5     Selective Call Forwarding (SCF)
        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
                 6.16.1     Calling Name Identification Presentation (CNIP)
                 6.16.2     Calling Name Identification Restriction (CNIR)
       6.17     Number identification services
                 6.17.1     Calling Line Identification Presentation (CLIP)
                 6.17.2     Calling Line Identification Restriction (CLIR)
                 6.17.3     Connected Line Identification Presentation (COLP)
                 6.17.4     Connected Line Identification Restriction (COLR)
       6.18     Outgoing Call Barring (OCB)
       6.19     Reverse charging (REV)
       6.20     Sub-addressing (SUB)
       6.21     Support of Private Numbering Plan (SPNP)
       6.22     Terminal Portability (TP)
       6.23     User-to-User Signalling (UUS)
 7     SDL description