column, landscape or portrait mode, and figures that you can click or tap to enlarge. For additional information about the settings and features on your reading device or app, visit the device manufacturer's Web site. Many titles include programming code or configuration examples. To optimize the presentation of these elements, view the e-book in single-column, landscape mode and adjust the font size to the smallest setting. In addition to presenting code and configurations in the reflowable text format, we have included images of the code that mimic the presentation found in the print book; therefore, where the reflowable format may compromise the presentation of the code listing, you will see a "Click here to view code image" link. Click the link to view the print-fidelity code image. To return to the previous page viewed, click the Back button on your device or app. www.TechnicalPDF.com Praise for the Essential Guide to Telecommunications, Sixth Edition "Dodd's The Essential Guide to Telecommunications provides the history and context that make a fundamental underpinning of modern business more accessible to technologists and businesspeople alike. This new edition of her primer is an essential reference in the continuously evolving communications landscape." -Tom Hopcroft, President and CEO, Mass Technology Leadership Council "Annabel Dodd' book is a clear guide and big-picture view of technologies and industries. It is an up-to-date guide for anyone who wants to be familiar with important innovations and key technologies. This is truly an industry bible for mobile, Internet, and networking services." -Hiawatha Bray, Technology Reporter, The Boston Globe "Ms. Dodd" aptly titled The Essential Guide to Telecommunications has been my bible for all things telecom since my days as an AT&T transmission network engineer nearly twenty years ago. Exhaustively and meticulously researched, concisely written for lay folks and techs/engineers alike, this book aids me in my current role as an IT Support Technician II when d