The papers in this volume have been contributed by telecommunications professionals from all over the world. Telecom networks are flourishing even in the less-developed countries. The economic development in countries such as South-East Asia is based on a swift implementation of technical changes. This means, in most cases, a communication-based development. In those countries which initiated telecommunications development, a new wave of technologies is booming and many changes are taking place. This volume will contribute to finding ways and means of taking positive advantage of the formidable opportunities presented by telecommunications technologies.