ster thesis, Cape Town University, South Africa, May. [15] Denning, D. E. 1987. An Intrusion Detection Model, IEEE Transactions on Software Engineering 13(2), 118-31. [16] Manikopoulos, C. and S. Papavassiliou. 2002. Network intrusion and fault detection: A Statistical Anomaly Approach. In Proceedings of the IEEE Communications Magazine, 76-82. C 2009 by Taylor & Francis Group, LLC IP COMMUNICATIONS SIP Trunking Migrating from TDM to IP for Business to Business Communication Christina Hattingh Darryl Sladden ciscopress.com ATM Zakaria Swapan SIP Trunking Christina Hattingh Darryl Sladden ATM Zakaria Swapan Cisco Press 800 East 96th Street Indianapolis, IN 46240 ii SIP Trunking SIP Trunking Christina Hattingh, Darryl Sladden, and ATM Zakaria Swapan Copyright © 2010 Cisco Systems, Inc. Published by: Cisco Press 800 East 96th Street Indianapolis, IN 46240 USA All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without written permission from the publisher, except for the inclusion of brief quotations in a review. Printed in the United States of America First Printing March 2010 Library of Congress Cataloging-in-Publication Data is on file. ISBN-13: 978-1-58705-944-5 ISBN-10: 1-58705-944-4 Warning and Disclaimer This book is designed to provide information about Session Initiation Protocol (SIP) networking technolo- gy. Every effort has been made to make this book as complete and as accurate as possible, but no warran- ty or fitness is implied. The information is provided on an "as is" basis. The authors, Cisco Press, and Cisco Systems, Inc. shall have neither liability nor responsibility to any person or entity with respect to any loss or damages arising from the information contained in this book or from the use of the discs or programs that may accompany it. The opinions expressed in this book belong to the authors and are not necessarily those of Cisc