Resumen:
The document deals with the ISDN user part version 2 for the international interface. Part 12 specifies the stage 3 of the conference call, add-on supplementary service.
Das Dokument behandelt den ISDN-Anwenderteil, Version 2, für die internationale Schnittstelle. Teil 12 spezifiziert die Stufe 3 für das Dienstmerkmal "Konferenz".
Keywords:
Communication networks, Communication service, Conference calls, ETSI, Integrated services digital network, Interfaces, Interfaces (data processing), ISDN, Signal transmission, Signalling systems, Supplementary services, Telecommunication, Telecommunication networks, Telecommunication systems, Telecommunications, Telephone networks