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Deploying Voice over Wireless LANs / Edition 1
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Deploying Voice over Wireless LANs / Edition 1

by Jim Geier
 

ISBN-10: 1587052318

ISBN-13: 9781587052316

Pub. Date: 03/28/2007

Publisher: Cisco Press

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

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

Part II Critical Technologies

Chapter 4 Wireless LAN Technologies

Chapter 5 VoWLAN Security Solutions

Part III Implementation Steps

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

Product Details

ISBN-13:
9781587052316
Publisher:
Cisco Press
Publication date:
03/28/2007
Series:
Networking Technology Series
Edition description:
New Edition
Pages:
264
Product dimensions:
7.57(w) x 9.48(h) x 0.78(d)

Table of Contents

Part I Fundamental Elements

Chapter 1 VoWLAN Applications and Benefits

The Role of VoWLAN Solutions

History of VoWLANs

VoIP

Wireless LANs

Healthcare

Enterprises

Universities

Retail

Warehouses

Manufacturing

Small Offices and Homes

Security Systems

Determining ROI

Initial Analysis

Costs

Savings

Payback Period

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

Traditional Access Point Networks

Wireless Switched Networks

Mesh Networks

Chapter Summary

Chapter Review Questions

Chapter 3 VoWLAN Signaling Fundamentals

Voice Attributes

Video Attributes

VoIP Call Flow

H.323

Skinny Client Control Protocol (SCCP)

Session Initiation Protocol (SIP)

Radio Frequency (RF) Signals

Modulation

RF Signal Characteristics

Gain

Signal-to-Noise Ratio

Spread Spectrum

Orthogonal Frequency Division Multiplexing (OFDM)

FCC Rules

Wireless Impairments

Poor Signal Coverage

Latency

RF Interference

Limited Capacity

Multipath

Chapter Summary

Chapter Review Questions

Part II Critical Technologies

Chapter 4 Wireless LAN Technologies

Infrastructure Mode

Scanning

Data Transfer

Roaming

Ad Hoc Mode

Wireless Medium Access

DCF

PCF

802.11 Physical Layer Standards

802.11a

802.11b

802.11g

802.11n

Comparison of 802.11 Standards

Wireless Configuration Parameters

SSID

RF Channels

Transmit Power

Data Rates

Power-Save Mode

RTS/CTS

Fragmentation

RTS/CTS and Fragmentation Summary

Chapter Summary

Chapter Review Questions

Chapter 5 VoWLAN Security Solutions

Security Implications

Passive Monitoring

Unauthorized Access

Denial of Service

Encryption

WEP

TKIP

AES

WPA

802.11i

Virtual Private Networks

Authentication

Open System Authentication

Shared Key Authentication

IEEE 802.1X

Cisco LEAP

Tips for Enhancing Security

SSID Broadcasting

Systems Management

Access Point Installation

Rogue Access Points

Signal Propagation

Chapter Summary

Chapter Review Questions

Part III Implementation Steps

Chapter 6 Analyzing VoWLAN Requirements

Overall Requirements Analysis Steps

Identifying Potential Requirements

Applications

Users

Utilization

Coverage Areas

Roaming

Environment

Security

Client Devices

Existing Systems

Policies and Preferences

Budget

Schedules

Verifying and Validating Requirements

Documenting Requirements

Chapter Summary

Chapter Review Questions

Chapter 7 Designing a VoWLAN Solution

Overall Design Steps

Deployment Models

Single-Site Architecture

Multisite WAN with Centralized Call Processing

Multisite WAN with Distributed Call Processing

Roaming

Security

Network Infrastructure

Virtual LANs

Multicasting

Switch Recommendations

Quality of Service

Placement of Access Points

Wireless Capacity Analysis

RF Site Survey

Document Findings

Chapter Summary

Chapter Review Questions

Chapter 8 Installing, Configuring, and Testing a VoWLAN System

Installing Access Points

Getting Started

Mounting Practices

Antenna Alignment

Electrical Power Distribution

Configuring Access Points

Configuration Setting Access

Firmware

VLANs

SSID

Transmit Power

RF Channel

Data Rates

Filtering

Protection Mechanisms

Installing and Configuring Cisco CallManager Software

Cisco CallManager Software Installation

System Parameters

Subscriber Setup

Device Mobility Issues

Configuring Wireless IP Phones

Firmware

Network Settings

RF Settings

Phone Settings

Verifying System Operation

Association Tests

Authentication Tests

Registration Tests

Phone Call Tests

Load Tests

Follow-up Tests

Battery Life Issues

Chapter Summary

Chapter Review Questions

Chapter 9 Supporting a VoWLAN System

Configuration Management

RF Channel Changes

Transmit Power Changes

New Applications

Signal Coverage

Firmware Version

Security Improvement

Network Monitoring

Performance Monitoring

Coverage Monitoring

Configuration Monitoring

Security Policy Management

Security Assessment Steps

Review Existing Security Policies

Review the System Architecture

Review Operational Support Tools and Procedures

Interview Users

Verify Configurations of Wireless Devices

Investigate Physical Installations of Access Points

Identify Rogue Access Points

Perform Penetration Tests

Analyze Security Gaps

Recommend Improvements

Maintenance Functions

Inoperative Access Points

Poor Performance

Poor Signal Coverage

Broken Hardware

Keep Firmware Up to Date

Monitor Performance

Verify Coverage

Inspect Access Points

Engineering Functions

Advanced Problem Resolution

Coverage Expansion

Capacity Increases

Firmware Review

Technology Upgrade

Design Review

Help Desk Planning

Connection Problems

Poor Signal Coverage

Poor Performance

System Status

Additional Considerations

CiscoWorks Wireless LAN Solution Engine

Automatic Access Point Configuration

Assisted Site Surveys

Centralized Firmware Updates

Dynamic Grouping

VLAN Configuration

Multiple SSID Support

Customizable Thresholds

Fault Status

Intrusion Detection System

Security Policy Monitoring

Secure User Interface

Air/RF Scanning and Monitoring

Self-healing Functions

Reporting, Trending, Planning, and Troubleshooting

Chapter Summary

Chapter Review Questions

Appendix A Answers to Chapter Review Questions

Glossary

1587052318 TOC 2/12/2007

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