A common numbering infrastructure for IN and IP telephony

This paper describes and analyses a solution to the problem of interoperability between Intelligent Networks and Voice over IP (VoIP) networks for directory-based routing. We will present an architecture based on a distributed database on the circuit switched network and the IP netll´ork. The aim of the solution is to provide efficient service management, efficient routing for 800- and cellular numbers and personal number portability between both architectures.