prSSH ETS 300 754-1:1997 ed.1

Integrated Services Digital Network (ISDN); Signalling System No.7; Transaction Capabilities (TC); Application Service Element (ASE) for Message Waiting Indication (MWI) supplementary service; Part 1: Protocol specification

Scope

This first part of ETS 300 754 specifies the stage three of the Message Waiting Indication (MWI) supplementary service for the pan-European Integrated Services Digital Network (ISDN) as provided by the European public telecommunications operators by means of the Signalling System No.7 Transaction Capabilities (TC) application protocol. The stage three identifies the protocol procedures and switching functions needed to support a telecommunication service (see CCITT Recommendation I.130 [7]). This ETS specifies the additional requirements where the service is provided to the user via an intermediate ISDN.