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This book explains how telecommunications networks work. It uses straightforward language supported by copious block-schematic diagrams so that non-engineers and engineers alike can learn about the principles of fixed and mobile telecommunications networks carrying voice and data. The book covers all aspects of today's networks, including how they are planned, formed and operated, plus next generation networks and how they will be implemented. After an introductory chapter on telephony the book briefly describes all of today's networks – PSTN, mobile, cable television, the Internet, etc. – and considers how they interconnect. Individual chapters then consider the principles, technologies and network structures relating to transmission, circuit switching, signalling and control, data (including voice-over-IP) networks, and mobile networks. The important subject of numbering and addressing for telephony and IP is then covered. The book concludes with a chapter designed to pull everything together, considering architecture, quality of service and performance, operations and network evolution. Despite the rapid changes taking place in telecommunications today - covering customer expectations, commercial arrangements, regulation, markets and services, as well as technology - this book's coverage of the basic principles makes it a helpful and enduring reference for undergraduate and postgraduate students, and for professionals working in the industry.
Andy Valdar has had a wide ranging career in telecommunications, covering network planning, international standardisation, training, marketing and product management, advising on regulation, and developing strategy. After 30 years working for BT, including three years on secondment to the United Nations in India, he joined University College London in 1999 as a visiting professor in telecommunications strategy. The content of this, his second book, is based on his experience at BT and his lecturing on MSc courses in telecommunications. Andy's other interests include his chairmanship of the editorial board of the Journal of the Communications Network and active participation in organising international telecommunication conferences.