Whether youre new to telecommunications and IT or simply want an understandable, comprehensive review of the state-of-the-art, this book is for you. Leading telecommunications trainer and consultant Lillian Goleniewski combines clear explanations of fundamental principles with in-depth, up-to-the minute coverage of networking and the Internet. More than competitive guides, Telecommunications Essentials combines the global breadth and technical depth readers need to truly master telecommunications. Telecommunications Essentials covers the entire spectrum of telecommunications technology and services, current and emerging: telephony (voice networks), IP telephony, data networks, broadband, cable, xDSL, wireless, the PSTN (Public Switched Telephone Network), pervasive computing, Quality of Service, and much more. The book is supported by a telecommunications knowledge Web portal delivering over 5,500 key telecom and Internet technology resources. For every professional who needs to understand telecommunications, including IT professionals, business decision-makers, marketers, salespeople, public relations professionals, investors, and many others.