scope:

This standard defines the stage one of the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators for the circuit-mode 64 kbit/s unrestricted 8 kHz structured bearer service category. 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.

This standard defines the interworking requirements of private ISDNs with the public ISDN.

In addition this standard specifies the base functionality where the service is provided to the user via a private ISDN.

This standard does not specify the additional requirements where the service is provided to the user via a telecommunications network that is not an isdn but does include interworking requirements of other networks with the public ISDN.

Charging principles are outside the scope of this standard.

The values of the general attributes are outside the scope of this standard.

The circuit-mode 64 kbit/s unrestricted 8 kHz structured bearer service category provides unrestricted information transfer between coincident S and T reference points (see CCITT Recommendation I.411 [2]).

This standard is applicable to the stage two and stage three standards for the ISDN circuit-mode 64 kbit/s unrestricted 8 kHz structured bearer service category. The terms "stage two" and "stage three" are also defined in CCITT Recommendation I.130 [1]. Where the text indicates the status of a requirement, i.e. as strict command or prohibition, as authorisation leaving freedom, as a capability or possibility, this shall be reflected in the text of the relevant stage two and stage three standards.