CONTENTS

 1     Introduction
        1.1     General
        1.2     Definitions
        1.3     Symbols and abbreviations
        1.4     Services supported by this Recommendation
        1.5     Service invocation
 2     Call set-up and release
        2.1     Functional model
        2.2     Information flows required for en-bloc and digit-by-digit sending call set-up and call release
        2.3     SDLs
        2.4     Interworking between public and private ISDNs
        2.5     Functional entity actions
        2.6     Additional FEAs required for digit-by-digit call setup cases
        2.7     Allocation of functions to physical entities
Annex A  –  Interaction with Supplementary Services