Table of Contents

Foreword
1 Scope
2 Normative references
3 Definitions
4 Symbols and abbreviations
5 Description
6 Operational requirements
  6.1 Provision and withdrawal
  6.2 Requirements on the originating network side
  6.3 Requirements on the destination network side
7 Coding requirements
8 State definitions
9 Signalling procedures at the coincident S and T
  reference point
  9.1 Activation
  9.2 Deactivation
  9.3 Registration
  9.4 Call offering
  9.5 Call confirmation
  9.6 Call waiting acceptance
10 Procedures for interworking with private ISDNs
  10.1 Served user is on a private ISDN
  10.2 Calling user is on a private ISDN
11 Interaction with other networks
12 Interaction with other supplementary services
13 Parameter values
14 Dynamic description (SDLs)
Annex A (Informative): Signalling flows
History

Abstract

Specifies the stage three of the Call Waiting (CW) supplementary service for the pan-European Integrated Services Digital Network (ISDN) as given by European public telecommunications operators at the T reference point or coincident S and T reference by using the Digital Subscriber Signalling No.one (DSS1). Does not specify the additional protocol requirements where the service is provided to the user via a telecommunications network that is not an ISDN. Specifies the protocol requirements at the T reference point where the service is provided to the user via a private ISDN.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	SPS 5