scope:

The present document defines the stage one of the teleaction bearer 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 for the teleaction bearer services supported by networks other than ISDN (including private ISDNs) with the teleaction bearer services described in the present document. The present document does not specify the additional requirements where the service is provided to the user via a telecommunications network that is not ISDN but does include interworking requirements of other networks with the public ISDN. Charging principles are outside the scope of the present document.