Integrating Voice Over IP Services in IPv4 and IPv6 Networks

The transition from the current IPv4 network protocol structure to the next generation IPv6 network has always been deemed as a lengthy process. As the deployment of IPv6 infrastructures evolves, interaction with the existing IPv4 networks is unavoidable. This interaction may occur at the network level (simple data pass-through) or at the application level (between IPv6 and IPv4 endpoints). In this paper, the authors concentrate on application level interoperability and select an increasingly popular application: Voice over IP (VoIP). The use of VoIP technologies is becoming more widespread as end-users and network providers recognise the potential benefits that the usage of the application provides.