Deploying Voice over Wireless LANs by Jim Geier Publisher: Cisco Press Pub Date: March 14, 2007 Print ISBN-10: 1-58705-231-8 Print ISBN-13: 978-1-58705-231-6 Pages: 264 Table of Contents | Index Overview Deploying Voice over Wireless LANs The definitive guide to planning, architecting, deploying, supporting, and creating Voice over Wireless LAN solutions Recent advances make it possible to deliver high-quality voice and video communications over a wireless LAN (WLAN), replacing costly wired telephone and video surveillance systems and dramatically reducing support costs However, today's new voice over WLAN (VoWLAN) technologies require fundamentally different skills and techniques from those used in traditional voice and video systems Now, there's a complete guide to every facet of VoWLAN deployment: planning, design, installation, security, maintenance, and troubleshooting Authored by wireless industry expert and leader Jim Geier, Deploying Voice over Wireless LANs draws on Geier's extensive experience with real-world VoWLAN deployments Geier brings together state-of-the-art insights into VoWLAN technologies, standards, products, services, implementation strategies, and much more Geier begins by introducing key components of today's VoWLAN systems, including phones, client software, and voice encoders/decoders, as well as VoWLAN signaling essentials such as analog-to-digital (A/D) conversion and compression Using examples drawn from actual enterprise settings, you'll learn exactly how VoWLAN products integrate with existing IP infrastructure Next, he introduces crucial emerging 802.11 standards for effective VoWLAN deployment, including 802.11e quality of service (QoS) standards, 802.11r to minimize packet loss between access points, and 802.11k network discovery He carefully reviews the security implications of VoWLAN voice, systematically covering both risks and countermeasures Finally, Geier walks through implementation from start to finish, thoroughly covering analysis, design, installation, configuration, testing, and support Whatever your role in planning, delivering, managing, or creating wireless voice and video solutions, Deploying Voice over Wireless LANs is your most comprehensive, authoritative resource Jim Geier founded Wireless-Nets, Ltd., and serves as its principal consultant His 25 years of experience includes the analysis, design, software development, installation, and support of numerous wireless networking systems He has been active within the Wi-Fi Alliance and the IEEE 802.11 Working Group and helped develop international standards for WLANs His books include Wireless Networks First Step (Cisco Press), Wireless LANs (Sams), Wireless Networking Handbook (MTP), and Network Reengineering Understand VoWLAN components, applications, and benefits See VoWLAN at work in actual enterprise environments Master VoWLAN signaling, including voice signal characteristics, A/D conversion, and compression Discover the latest 802.11 VoWLAN standards, including 802.11e, 802.11r, and 802.11k Secure IP-based VoWLAN systems against intrusion and compromise Analyze your organization's requirements and design an optimal VoWLAN solution Plan for capacity, roaming, and integration with cellular systems Install, configure, test, verify, and validate your VoWLAN system Plan for operational support and implement appropriate administration tools and methods Includes a complete VoWLAN glossary Part I Fundamental Elements Chapter 1 VoWLAN Applications and Benefits Chapter 2 VoWLAN System Components Chapter 3 VoWLAN Signaling Fundamentals Chapter 4 Wireless LAN Technologies Chapter 5 VoWLAN Security Solutions Chapter 6 Analyzing VoWLAN Requirements Chapter 7 Designing a VoWLAN Solution Chapter 8 Installing, Configuring, and Testing a VoWLAN System Chapter 9 Supporting a VoWLAN System Appendix A Answers to Chapter Review Questions Glossary This book is part of the Networking Technology Series from Cisco Press®, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers Category: Cisco Press–Networking Covers: Voice over Wireless LAN Solutions Deploying Voice over Wireless LANs by Jim Geier Publisher: Cisco Press Pub Date: March 14, 2007 Print ISBN-10: 1-58705-231-8 Print ISBN-13: 978-1-58705-231-6 Pages: 264 Table of Contents | Index Copyright About the Author Acknowledgments Icons Used in This Book Command Syntax Conventions Introduction Part I: Fundamental Elements Chapter 1 VoWLAN Applications and Benefits The Role of VoWLAN Solutions History of VoWLANs Healthcare Enterprises Universities Retail Warehouses Manufacturing Small Offices and Homes Security Systems Determining ROI Chapter Summary Chapter Review Questions Chapter 2 VoWLAN System Components VoWLAN System Overview Cisco 7920 Wireless IP Phone Cisco IP Softphone Cisco CallManager Cisco CallManager Express Linksys Wi-Fi Video Cameras Wireless Network Infrastructures Chapter Summary Chapter Review Questions Chapter 3 VoWLAN Signaling Fundamentals Voice Attributes Video Attributes VoIP Call Flow Radio Frequency (RF) Signals Wireless Impairments Chapter Summary Chapter Review Questions Part II: Critical Technologies Chapter 4 Wireless LAN Technologies Infrastructure Mode Ad Hoc Mode Wireless Medium Access 802.11 Physical Layer Standards Wireless Configuration Parameters Chapter Summary Chapter Review Questions Chapter 5 VoWLAN Security Solutions Security Implications Encryption Authentication Tips for Enhancing Security Chapter Summary Chapter Review Questions Part III: Implementation Steps Chapter 6 Analyzing VoWLAN Requirements Overall Requirements Analysis Steps Identifying Potential Requirements Verifying and Validating Requirements Documenting Requirements Chapter Summary Chapter Review Questions Chapter 7 Designing a VoWLAN Solution Overall Design Steps Deployment Models Roaming Security Network Infrastructure Placement of Access Points Document Findings Chapter Summary Chapter Review Questions Chapter 8 Installing, Configuring, and Testing a VoWLAN System Installing Access Points Configuring Access Points Installing and Configuring Cisco CallManager Software Configuring Wireless IP Phones Verifying System Operation Chapter Summary Chapter Review Questions Chapter 9 Supporting a VoWLAN System Configuration Management Network Monitoring Security Assessment Steps Maintenance Functions Engineering Functions Help Desk Planning CiscoWorks Wireless LAN Solution Engine Chapter Summary Chapter Review Questions Appendix A Answers to Chapter Review Questions Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter 9 Glossary | A B C D E–F G H I–J–K L M N O P Q–R S T U–V W–Z Index Copyright Deploying Voice over Wireless LANs Jim Geier Copyright © 2007 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 1 2 3 4 5 6 7 8 9 0 First Printing March 2007 Library of Congress Cataloging-in-Publication Number: 2004117087 ISBN-13: 978-1-58705-231-6 Trademark Acknowledgments All terms mentioned in this book that are known to be trademarks or service marks have been appropriately capitalized Cisco Press or Cisco Systems, Inc cannot attest to the accuracy of this information Use of a term in this book should not be regarded as affecting the validity of any trademark or service mark Warning and Disclaimer This book is designed to provide information about the budgets call processing agents client devices coverage areas documenting environments existing systems identifying policies/preferences roaming schedules security users utilization verifying restrooms, coverage areas results, test retail, VoWLANs return on investment (ROI) reviewing design existing security policies firmware operational support tools system architecture RF (radio frequency) channels access points wireless LANs interference modifying monitoring signals characteristics coverage FCC rules gain modulation OFDM SNR spread spectrum site surveys 2nd spectrum analyzers wireless IP phones roaming design infrastructure wireless LANs IP Phone VoWLAN requirements Wi-Fi rogue access points 2nd ROI (return on investment), determining role of VoWLAN solutions route groups, CallManager routing, packets RRJ (Registration Reject) RRQ (Registration Request) RTP (Real-Time Transport Protocol) RTS/CTS (request-to-send/clear-to-send) 2nd Index [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] safety savings, ROI scanning infrastructure wireless LANs SCCP (Skinny Client Control Protocol) 2nd schedules, VoWLAN requirements scope, testing security AES 2nd 3rd Cisco 7920 Wireless IP Phone design gaps IDS interfaces mesh networks optimizing policies 2nd RF settings training VoWLAN 2nd access point installation authentication DoS attacks encryption IEEE 802.11i optimizing passive monitoring requirements rogue access points signal propagation SSID broadcasting systems management TKIP unauthorized access VPNs WEP WPA selecting passwords self-healing functions servers ACS MCSs Service Set Identifiers [See SSIDs (Service Set Identifiers).] Session Initiation Protocol (SIP) settings [See also configuration.] access points data rates filtering firmware protection mechanisms RF channels SSIDs transmit power VLANs networks, wireless IP Phones RF Setup message (H.323) shared key authentication signal-to-noise ratio (SNR) signals access points [See also access points.] AirMagnet Analyzer capacity coverage areas 2nd 3rd 4th interference latency multipath interference propagation RF characteristics FCC rules gain modulation OFDM SNR spread spectrum roaming testing 2nd troubleshooting uplink video attributes voice attributes VoIP call flow H.323 SCCP SIP signatures, RF interference sources Simple Network Management Protocol [See SNMP (Simple Network Management Protocol).] single-site architecture SIP (Session Initiation Protocol) 2nd site surveys access points assisted documentation RF Skinny Client Control Protocol (SCCP) small offices and homes SNMP (Simple Network Management Protocol) SNR (signal-to-noise ratio) 2nd solutions, role of VoWLAN specifications, Linksys Wireless-G Internet Video Camera spectrum analyzers spread spectrum SRST (Survivable Remote Site Telephony) 2nd SSIDs (Service Set Identifiers) 2nd access points broadcasting mesh networks multiple RF settings wireless LANs stairwells, coverage areas status, fault subscriber setup, CallManager support, VLAN Survivable Remote Site Telephony (SRST) switched networks, wireless switches systems architecture [See also architecture.] management parameters, CallManager schedules status, troubleshooting Index [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] Task Group R technology upgrades Temporal Key Integrity Protocol [See TKIP (Temporal Key Integrity Protocol).] TerminalCapabilitySet message (H.323) terminals, H.323 test teams testing association authentication batteries follow-up loads microwave oven interference penetration phone calls policies registration results scope security 2nd signals 2nd tools VoWLAN TFTP (Trivial File Transfer Protocol) thresholds, customizing TIM (traffic indication map) TKIP (Temporal Key Integrity Protocol) 2nd tones, DTMF tools, testing traffic indication map (TIM) training, security transfers, data transmissions, signal propagation transmit power access points Cisco 7920 Wireless IP Phone modifying 2nd RF settings wireless LANs Trivial File Transfer Protocol (TFTP) troubleshooting [See also testing.] batteries connections help desks hidden nodes maintenance access points firmware hardware performance 2nd security 2nd signals 2nd capacity coverage interference latency multipath interference system status types of scanning Index [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] unauthorized access universities, VoWLANs updating firmware 2nd 3rd upgrading technology uplink signal strength, optimizing user-based authentication users interviewing VoWLAN requirements utility rooms, coverage areas utilization VoWLAN requirements Wi-Fi video Index [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] validation, VoWLAN requirements verification access points coverage VoWLAN 2nd wireless device configuration versions, firmware video attributes cameras virtual LANs [See VLANs (virtual LANs).] Virtual Private Networks [See VPNs (Virtual Private Networks).] visual inspection of facilities VLANs (virtual LANs) access points configuring support Vocaltec, Inc voice attributes gateways ISDN backups VoIP (Voice over Internet Protocol) call flow H.323 SCCP SIP call managers voice attributes VoWLAN access points documentation RF site surveys wireless capacity analysis architecture Cisco IP Softphone configuration management firmware versions new application requests RF channel changes security optimization signal coverage transmit power changes deployment models multisite WAN single-site architecture design engineering functions advanced problem resolution capacity increases coverage expansion design review firmware review technology upgrades enterprises healthcare history of infrastructure multicasting QoS switches virtual LANs manufacturing requirements analysis steps applications budgets client devices coverage areas documenting environments existing systems identifying policies/preferences roaming schedules security users utilization verifying retail roaming ROI, determining security 2nd 3rd access point installation AES assessments 2nd authentication DoS attacks encryption IEEE 802.11i optimizing passive monitoring rogue access points signal propagation SSID broadcasting systems management TKIP unauthorized access VPNs WEP WPA small offices and homes solutions universities verifying warehouses VPNs (Virtual Private Networks) Index [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] walls, painting WANs (wide area networks) centralized call processing distributed call processing warehouses, VoWLANs 2nd WEP (Wired Equivalent Privacy) 2nd wide area networks [See WANs (wide area networks).] Wi-Fi roaming video Wi-Fi Protected Access [See WPA (Wi-Fi Protected Access).] Wi-Fi Protected Access 2 (WPA2) Wired Equivalent Privacy [See WEP (Wired Equivalent Privacy).] wireless adapters, Cisco 7920 Wireless IP Phone wireless capacity analysis wireless devices, verifying wireless IP Phones configuring firmware network settings RF settings packets wireless LANs [See WLANs (wireless LANs).] wireless network infrastructures access points mesh networks 2nd switched networks Wi-Spy WLANs (wireless LANs) adapters Ad Hoc mode capacity configuring data rates fragmentation power-save mode RF channels RTS/CTS SSIDs transmit power IEEE 802.11 standards 802.11a 802.11b 802.11g 802.11n infrastructure data transfers roaming scanning interference latency Linksys Wireless-G Internet Video Camera multipath interference troubleshooting wireless medium access DCF PCF WLSE (CiscoWorks Wireless LAN Solution Engineer) WPA (Wi-Fi Protected Access) WPA2 (Wi-Fi Protected Access 2) ... Category: Cisco Press Networking Covers: Voice over Wireless LAN Solutions Deploying Voice over Wireless LANs by Jim Geier Publisher: Cisco Press Pub Date: March 14, 2007 Print ISBN- 10: 1-58705-231-8 Print ISBN- 13: 978-1-58705-231-6... VoWLAN System Overview Cisco 7920 Wireless IP Phone Cisco IP Softphone Cisco CallManager Cisco CallManager Express Linksys Wi-Fi Video Cameras Wireless Network Infrastructures Chapter Summary Chapter Review Questions... I–J–K L M N O P Q–R S T U–V W–Z Index Copyright Deploying Voice over Wireless LANs Jim Geier Copyright © 2007 Cisco Systems, Inc Published by: Cisco Press 800 East 96th Street Indianapolis, IN 46240 USA