Ray Horak held management and executive management positions with Southwestern Bell, Continental Telephone Company (CONTEL), and Communications Group Inc. An independent consultant and popular speaker, trainer, author, columnist, and writer, he is the author of the bestselling Communications Systems and Networks, published most recently by Wiley and now in its third edition. Mr. Horak teaches seminars around the world on a variety of telecommunications subjects. He also has considerable experience as a consulting technical expert and expert witness in litigation involving patents, copyrights, trademarks, and other intellectual property matters. Less