scope:

This ETS defines the Intelligent Network Application Protocol (INAP) required for support of Capability Set 1 (CS1). It supports interactions between the following four Functional Entities (Fes), as defined in the Intelligent Network (IN) Functional Model:

- Service Switching Function (SSF);

- Service Control Function (SCF);

- Specialised Resource Function (SRF);

- Service Data Function (SDF).

The scope of this ETS is the further development of the INAP for both the Integrated Services Digital Network (ISDN) and Public Switched Telecommunications Network (PSTN).

It is intended as a guide to implementors and network operators to ensure interworking between different manufacturers equipment for all the IN CS1 defined interfaces (SCF-SSF, SCF-SRF and SCF-SDF) and between network operators for the internetwork interface (SCF-SDF).

As this ETS is intended for the early introduction of IN in the existing ISDN/PSTN, only simple solutions are assumed for solving the service interaction problems between IN and ISDN/PSTN.

Note: More sophisticated solutions for the service interactions between IN and the ISDN/PSTN environment should be studied in the scope of the future versions of INAP and the ISDN/PSTN signaling standards.