Voice Over IP Implementation Using Session Initiation and Media Gateway Control Protocols

This paper investigates the feasibility of using several different protocols for building VoIP gateway. The protocols that were used in the implementation were Session Initiation Protocol (SIP), Media Gateway Control Protocol (MGCP), Real-time Transfer Protocol (RTP) and Session Description Protocol (SDP). Implementation has shown that these protocols are suitable for building VoIP gateways and services. They also offer a good foundation for different kinds of multimedia services in the future.

These protocols are also suitable for similar kinds of implementations in the wireless mobile world. Personal Digital Assistants (PDAs) are already capable of handling VoIP traffic in, for example, companies Local Area Networks. A metropolitan area range is out of the question at the moment, but there are projects that will try to cover the whole city area. When 3G and 4G networks are developed fully, mobile VoIP services will be available for all users.

Authors and Affiliations

1. Lappeenranta University of Technology, P.O. Box 20, 53851, Lappeenranta, Finland

   Ossi Kauranen & Jari Kellokoski

Editors and Affiliations

1. Lappeenranta University of Technology, Finland

   Olli Martikainen , Jari Porras  & Jenni Hyvärinen ,  & 

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