Design Considerations for the Implementation of a Mobile IP Telephony System in a Nuclear Power Plant

IP telephony, also called voice over Internet protocol (VoIP), is rapidly becoming a familiar term and technology that is implementing in the enterprise, education, government organizations and industry. Mobile IP telephony is the new generation of communications networks that makes possible the convergence of voice and data over wireless local area networks (WLANs). This technology combines data networks with mobile technologies to support voice and data applications over a common integrated network. A key advantage of IP telephony is that it allows the transmission of voice signals from conventional telephones over an IP data network, being either a public network (Internet) or a private network (Intranet). Figure 1 shows a general IP telephony system. IP telephony is designed to replace the legacy TDM (time division multiplexing) technologies and networks by an IP-based data network. Digitized voice will be carried in IP data packets over a LAN and/or WAN network. A major aspect involved in a voice conversation using mobile IP telephony is the conversion of analog or digital voice signals from conventional phones to IP packets for further transmission either to a fixed or mobile phone, over an IP network. One of the most important recommendations that can be made is to pay close attention to the infrastructure