CONTENTS

 1     Scope
 2     References
 3     Abbreviations
 4     Definitions
 5     Introduction
        5.1     Interaction between the VMS and its direct user
        5.2     Interaction between a Voice SFU and its direct user (i.e. VMS)
        5.3     Interaction between Voice SFUs
        5.4     Interaction between a Voice SFU and direct users of other services
 6     Overview
        6.1     Interconnection
        6.2     Technical requirements
        6.3     Accounting and settlement
 7     Interconnection requirements
        7.1     General
        7.2     Information exchange
        7.3     Voice encoding
        7.4     Transit arrangements
 8     Service interworking principles
        8.1     Message addressing
        8.2     Message identification
        8.3     Classes of service
        8.4     Message deferral
        8.5     Envelope
        8.6     Successful/unsuccessful message transfer notifications
        8.7     Successful/unsuccessful message delivery notifications
        8.8     Voice coding encoding conversion
 9     Quality of service
        9.1     Objectives
        9.2     Storage capacity
        9.3     Observations on the quality of service
        9.4     Duration of service