de, 279 Tau Validator, 203 Tau Simulator, 267 ELSEVIER VIDEO COMMUNICATIONS SOLUS James R. Wilcox & David K. Gibson VIDEO COMMUNICATIONS THE WHOLE PICTURE JAMES R. WILCOX WITH DAVID K. GIBSON ILLUSTRATIONS BY LAURA LONG AND MICHEL L. BAYARD CMPBooks San Francisco Published by CMP Books An imprint of CMP Media, Inc. 600 Harrison St., San Francisco, CA 94107 USA Web: www.cmpbooks.com Email: books@cmp.com Copyright © 2005 by James R. Wilcox & David K. Gibson All rights reserved. No part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system without the prior written permission of the publisher. For individual orders, and for information on special discounts for quantity orders, please contact: CMP Books Distribution Center, 6600 Silacci Way, Gilroy, CA 95020 Tel: 800-500-6875 or 408-848-3854 Fax: 408-848-5784 Email: bookorders@cmp.com Distributed to the book trade in the US and Canada by: Publishers Group West, 1700 Fourth St., Berkeley, CA 94710 Distributed in Canada by: Jaguar Book Group, 100 Armstrong Avenue, Georgetown, Ontario, M6K 3E7 Canada Library of Congress Cataloging-in-Publication Data Wilcox, James R. Video communications : the whole picture / by James R. Wilcox, with David K. Gibson ; illustrations by Laura Long and Michel L. Bayard-- 4th ed. p. cm. Rev. ed. of: Videoconferencing & interactive multimedia. 2000. Includes bibliographical references and index. ISBN 1-57820-316-3 (alk. paper) 1. Videoconferencing. 2. Computer conferencing. 3. Interactive multimedia. 4. Telecommunication systems. I. Gibson, David K.II. Wilcox, James R. Videoconferencing & interactive multimedia. III. Title. HF5734.7.W56 2005 384.55'6--dc22 2005008087 Illustrations by Laura Long and Michel Bayard Copy editing: James R. Wilcox Text design and layout: Jon Lee and Associates Printed in the United States of America 05 06 07 08 09 54321 1 ACKNOWLEDGMENTS I get by with a little help from my friends. The Beatles would like to acknowledge Toby Trowt-Bayard for he