The present document is based on ITU-T Recommendation Q.1224 [6]. It provides major modifications and further requirements to this base document. The scope of the IN Distributed Functional Plane (DFP) architecture for IN capability set 2 (CS2) is driven by the
service requirements of desired IN CS2 services, and constrained by the capabilities of the embedded base of evolvable network technology. The scope of functionality required to support desired IN CS2 services includes functionality to provide: end user access to call / service processing; service invocation and control; end user interaction with service control; service management; Call Party Handling; internetworking; security; Out-Channel Call Related User Interaction; Out-Channel Call Unrelated User Interaction; wireless Access; and Feature Interactions.
The scope of each of these aspects is addressed in clause 2 of ITU-T Recommendation Q.1224 [6] and is endorsed by the present document.
The present document follows the same document structure as ITU-T Recommendation Q.1224 [6] for clause 4 onwards and refers to text in ITU-T Recommendation Q.1224 [6] when there is no difference in the present document compared to ITU-T Recommendation Q.1224 [6]. If there are changes the related text is included in the relevant clause. Clause 1 (General), clause 2 (Scope of IN distributed functional plane for capability set 2) and clause 3 (Distributed
functional model for IN CS2) in ITU-T Recommendation Q.1224 [6] are endorsed by the present document. The following capabilities supported in ITU-T Recommendation Q.1224 [6] are excluded from the present document: The Hybrid Approach for the Connection View State; Trigger Detection Point - Notification for the SSF/CCF-SCF interface; DP specific INAP operations.
Only DP generic INAP operations are supported by ETSI Core INAP CS2 which means that following DP specific operations supported in ITU-T IN CS2 are not part of ET (...abbreviated)