Abstract: In the process of the convergence of IN and VoIP, soft SSF must be implemented in IP network in order to provide intelligent services for their users. However, the interface between soft SSF and soft switch hasn't been defined as an international standard. So an idea is brought about the interface definition and a CORBA-based distributed architeture of future IN concept is conceived. Finally, principle and simple implementation is described.

Key words: communication interface, soft SSF, soft switch, CORBA