The present document deals with the IP Federating Network (IPFN), an intelligent open interworking platform utilizing IP technology, allowing interconnection of existing and future networks. The networks interconnected may be fixed or mobile, 2G or 3G, IP or non-IP, public or private. The IPFN is composed of a set of functional subsystems, enabling users and applications of these networks to interoperate in fixed and mobile environments, and allowing for provision of value added services. From the users requirements and scenarios, a functional model is established, an architecture is defined based on the harmonization and evolution of existing architectures, reference points are identified, so as to list the existing protocols, identify the need for any protocol extensions and interworking specifications.

Levels of internetworking are defined depending on the Services offered like Security, Quality of Service, Supplementary Services and Data facilities.

Data may be exchanged, collected or shared between users.

New Services like global addressing, internetwork broadcast, multileg communications, etc, which are not yet available on the actual network to which the user is connected, may be offered.

Security will be an intrinsic capability of the architecture.

From this a set of recommendations is made in annex B, in order to help identifying the work in the different areas.