The present document is based on draft ITU-T Recommendation Q.1228 [26]. It provides major modifications and
further requirements to this base document.
This first part of the present document defines the Intelligent Network Application Protocol (INAP) required for support
of Capability Set 2 (CS2). It supports interactions between the following five Functional Entities (FEs), as defined in the
Intelligent Network (IN) functional model:
- Service Switching Function (SSF);
- Service Control Function (SCF);
- Service Data Function (SDF);
- Call Unrelated Service Function (CUSF);
- Specialized Resource Function (SRF).
The further development of the INAP for each of the Integrated Services Digital Network (ISDN) and Public Switched
Telecommunications Network (PSTN) and Public Land Mobile Networks (PLMN) is covered by the present document,
which is intended as a guide to implementers and network operators to ensure interworking between different
manufacturers equipment for the following IN CS2 defined interfaces:
- SCF-SSF;
- SCF-CUSF;
- SCF-SRF;
- SCF-SDF;
- SCF-SCF; and
- SDF-SDF.
As the present document is intended to facilitate 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 future versions of INAP and the ISDN/PSTN signalling standards.