Rec. I.257.1 (08/1992) … USER-TO-USER SIGNALLING
FOREWORD
1 Definition
2 Description
    2.1 General description
    2.2 Specific terminology
    2.3 Qualification of 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 requirements
6 Interaction with other supplementary services
    6.1 Call Waiting
    6.2 Call Transfer
    6.3 Connected Line Identification Presentation
    6.4 Connected Line Identification Restriction
    6.5 Calling Line Identification Presentation
    6.6 Calling Line Identification Restriction
    6.7 Closed User Group
    6.8 Conference Calling
    6.9 Direct-Dialling-In
    6.10 Call diversion services
    6.11 Line Hunting
    6.12 Three-Party Service
    6.13 User-to-User Signalling
    6.14 Multiple Subscriber Number
    6.15 Call Hold
    6.16 Advice of Charge
    6.17 Multi-level Precedence and Preemption
    6.18 Priority
    6.19 Malicious Call Identification
    6.20 Outgoing Call Barring
    6.21 Reverse Charging (Rev)
    6.22 Sub-addressing
7 Dynamic description
ANNEX A … Flow control mechanism for User-to-User Signalling service 3
ANNEX B … Interaction between User-to-User Signalling and call diversion services
ANNEX C … Alphabetical list of abbreviations used in this Recommendation