scope:

This ETS defines the stage one of the audiographic conference teleservice 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 in annex C), but does not deal with the details of the human interface itself. This ETS defines the interworking requirements of private ISDNs with the public ISDN. In addtion, this ETS specifies the base functionality where the service is provided to the user via a private ISDN.