The present document defines the stage one of the Explicit Call Transfer (ECT) supplementary service for the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators. Stage one is an overall service description from the user's point of view (see CCITT Recommendation I.130 [1]), but does not deal with the details of the human interface itself. The present document defines the interworking requirements of private ISDNs with the public ISDN. In addition the present document specifies the base functionality where the service is provided to the user via a private ISDN.
DS/EN 300367 V1.2.1:1999 history
1999DS/EN 300367 V1.2.1:1999 Integrated Services Digital Network (ISDN); Explicit Call Transfer (ECT) supplementary service; Service description