ITU-T Rec. D.232 (07/1996) – Specific tariff and accounting principles applicable to ISDN supplementary services
Source
FOREWORD
CONTENTS
1 Introduction
2 Charging aspects
    2.1 Number identification
    2.2 Direct-Dialling-In and Multiple Subscriber Number and Sub-addressing services
    2.3 Call Forwarding, Call Transfer and Call Deflection services
    2.4 Line Hunting
    2.5 Call Waiting and Call Hold
    2.6 Conference Calling
    2.7 Closed User Group, Private Number Plan
    2.8 Advice of Charge
    2.9 Priority service
    2.10 Multi-Level Precedence and Preemption service
    2.11 Outgoing Call Barring
    2.12 In-call Modification
3 Accounting
4 Charging mechanisms and support requirements
Annex A – Summary of charging mechanisms and support requirements for supplementary services
Annex B – Alphabetical list of abbreviations used in this Recommendation