IP Telephony Demystified / Edition 1

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Overview

“Focused on why the reader should care about a particular technology, and what the reader can gain from it.” — Steven Shepard, author of Telecommunications Convergence, now in its Second Edition

IS INTERNET TELEPHONY FOR YOU? IF SO, HOW? ANSWERS HERE

With a potential 90 percent reduction in phone costs, voice over data networks could offer your business substantial benefits. But how do you know if telephone over IP (Internet Protocol) suits your needs and setup? And if it does, what will it take to make it work? If you want straightforward answers to these questions, you’ve come to the right place. Lighting the way to IP telephony is Ken Camp’s specialty, and in IP Telephony Demystified he offers the best set of tools out there for making basic get-going decisions.

You must read this book if—

* you’re on IT staff or in management of a small business and investigating voice over data lines

* escaping from the telephone companies’ clutches sounds appealing

* the economies of voice and data on the same network are obvious

* the no-go or go decision on IP telephony is your assignment

* what's-in-it-for-my-company questions are uppermost in your mind

* direct, measurable benefits is an important item in your agenda

* choosing the right protocol might be a job-saver

* before wrestling SIP, H.323, or Megaco/H.248, you want to know if the match is worth the prize

* practical how-to's on integrating voice into your LAN could reduce your workload

* you'd rather have quality-of-service (QoS) answers—on IntServ, Diff Serv, and MPLS—than quality-of-service concerns

* a 3D view of cost and service implications is what you seek

IP telephony is simply voice sent over an IP network like the Internet. It can mean enormous savings—but not for every business. This is the book that will clarify whether it's right for your company, and if so, how to make it work.

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Editorial Reviews

From Barnes & Noble
The Barnes & Noble Review
In this book, Ken Camp starts out with a history and overview of telecommunications that puts the reader up to speed very quickly. Next, he engages in a useful discussion of Internet Protocol (IP) networking and the Internet, with a little history and a look at the protocols. A discussion of the transmission of voice in IP packets and telephony protocols gets to the meat of the subject. Then comes a brief look at the practical considerations of using IP telephony: traffic engineering, quality-of-service issues, and gateways between networks. Finally, premise-based telephony and network-based IP telephony services are discussed and evaluated, along with their future. The addition of an acronym and abbreviation list in Appendix A is outstanding.

IP telephony has potential for the future of business, but you'll need to understand the technology and the issues if you want to reap the benefits. Technology will continue to evolve: The key is to take advantage of IP telephony at the right time, and that time is now. This book will pave the way to that level of confidence and put you in the driver's seat! John Vacca

John Vacca, the former computer security official (CSO) for NASA's space station program (Freedom), has written 38 books about advanced storage, computer security, and aerospace technology.

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Product Details

  • ISBN-13: 9780071406703
  • Publisher: McGraw-Hill Companies, The
  • Publication date: 10/25/2002
  • Series: Demystified Series
  • Edition number: 1
  • Pages: 254
  • Sales rank: 1,427,050
  • Product dimensions: 7.30 (w) x 9.20 (h) x 0.57 (d)

Meet the Author

Ken Camp is the president and founder of IP Adventures, Inc., a strategic business and technology consulting firm that specializes in helping information professionals use technology to solve business problems. He is also a Consultant Member of Technical Staff with Hill Associates. He lives in Grand Isle, Vermont.

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Table of Contents

Preface
Acknowledgments
Ch. 1 History and Overview of Telecommunications 1
Public Switched Telephone Network 3
Structure of the Telephone Network 5
Analog versus Digital Signals 9
Bandwidth versus Passband 12
The Impact of Noise on Signals 15
Switching 17
Connectionless versus Connection-oriented Networks 20
Ch. 2 The Internet and IP Networking 23
OSI Network Reference Model 24
The Importance of TCP/IP and the Internet Protocol Suite 28
IP Addresses 34
Reliability versus Quick Delivery 41
Ch. 3 Fundamentals of Packetized Voice 53
A Word About the Standards 54
A Telephone Call Simplified 56
Analog to Digital Conversion 57
Pulse Amplitude Modulation (PAM) 58
The Complete Digitizing Process 61
IP Telephony versus Traditional Telephony 62
Voice Quality in the Network 64
When Does Packetized Voice Become Telephony? 67
Ch. 4 IP Telephony Protocols 71
H.323 Standards for Multimedia Over Packet Networks 74
Call Setup Using H.323 77
Session Initiated Protocol (SIP) 80
Session Description Protocol (SDP) 82
Call Setup Using SIP 83
Comparison of H.323 and SIP 85
Megaco and H.248 86
Real-time versus Nonreal-time Traffic 94
Which Protocol is Needed? Which is Best? 94
Ch. 5 The Lure of IP Telephony: Can It Work for Me? 97
Voice versus Data 98
The Cost of Doing Business 99
Telephony in the PSTN versus IP Telephony 101
When Does It Become IP Telephony? 104
Considerations for Business Evaluations 106
The Silver Bullet 109
IP Telephony in the Enterprise 111
IP Telephony in the Mid-Sized Business 113
IP Telephony in the Small Business 115
Debunking Myths 116
Preparing to Implement an IP Telephony Solution - Planning for Success 117
Ch. 6 Performance, Quality of Service, and Traffic Engineering 121
Quality of Service Parameters 124
Finding the Network Performance Envelope 127
Acceptable IP Telephony 131
Quality of Service within IP 131
Ch. 7 Gateways between Networks 145
Why Gateways Are Necessary 146
The Service Provider Basic Model 147
The Enterprise Model 152
Types of Gateways 155
Gateway or Softswitch? 156
Ch. 8 Premise-based Telephony 161
Digital Subscriber Line 165
Cable Modems 169
Satellite Internet 171
Fixed Wireless Internet Technologies 173
If We Build a High-Speed Network, Will They Come? 176
Work-at-Home Staff - Telecommuting 177
Replacing the PBX in the Office 179
Computer Telephony Integration (CTI) 184
Why Not Implement All Three? 186
Ch. 9 Network-based IP Telephony Services 187
Traditional Centrex Service 189
Centrex Evolves to IP Centrex 193
Does IP Telephony Include the Internet? 201
Privacy: Fact or Fiction? 201
Voice Over DSL/Frame/ATM - Variations on a Theme 202
Services Perspective 206
Ch. 10 The Future of IP Telephony 207
Beefing Up IP Telephony 210
Industry Changes Affecting IP Telephony 212
Disruptive Technology Takes Center Stage 213
Internet Call Centers 216
Fax Over IP 220
Voice Mail over IP 222
IP Telephony and Denial of Service (DoS) Attacks 224
The Future for Equipment Vendors 225
The Future for Telecommunications Service Providers 227
The Future for Business Users 229
The Evolution Continues 230
App. A: Glossary 233
App. B: Resource List 239
Index 243
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Customer Reviews

Average Rating 4.5
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Sort by: Showing all of 5 Customer Reviews
  • Anonymous

    Posted February 13, 2003

    Great Resource

    Camp undertakes the challenge of blending technologically difficult concepts with the business drivers and impacts that organizations face VoIP/IPT. The book is a good resource for those who don't have the desire, need or time to read the voluminous amount of information published in various standards & RFCs. It simplifies the concepts, describes the "whats" and the "whys", and it gives the reader a solid foundation on which to communicate within the arena of VoIP and IPT.

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  • Anonymous

    Posted November 30, 2002

    The right information at the right time

    Ken does a great job exploring the business ramifications, as well as technology underlying, IP Telephony. He tackles both the ¿how does it work¿ together with the ¿why we should care¿ so that those making strategic and technical decisions can make informed ones. Chapter 6 especially helps direct and pose tough questions one should ask for whether this solution is right for you. Ken is honest, straight forward and direct in his discussions. His use of analogies is such that even beginners, new the concepts can understand what is going on. Ken uses simple to understand language in his writing style for as the name implies, it is IP Telephony Demystified. Here is someone who has finally gone beyond just what the technology is and how it works to investigate, explore and uncover the ways to be success implementing it, and why you should or should not do so. To overlook IP Telephony as a new tool for tomorrow, along with Ken¿s book, would be a serious mistake.

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  • Anonymous

    Posted December 17, 2002

    Finally, a book that explains it right.

    This technology is complex and difficult to understand. The advantages of IP Telephony can be hard to grasp. Ken Camp¿s book truly demystifies IP Telephony. Ken explains the technology in ways that keep technical people interested, yet simplifies it for decision makers to implement IP Telephony solutions successfully. I will continue to take advantage of this book as an Internet consultant. More importantly, so will my clients.

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  • Anonymous

    Posted December 27, 2002

    Comprehensive yet succinct coverage of this important topic

    Are you a professional (engineer, manager, director, account executive) who needs to understand the salient issues surrounding IP Telephony quickly? If so, Ken Camp's new book is for you. I've been studying this topic for several years and never before have I come across a volume that is so succinct and approachable, and yet complete in its coverage of this much discussed technology arena. Are you a scientist or software developer who needs a book that covers every last bit of technical minutae, right down to the definition of every bit's function according to every published standard? If so, go get a copy of the standards. This book is for people who need to quickly understand the relevant aspects of IP Telephony and make sound business and technical decisions; if that includes you then you can't do better than Camp's latest work.

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  • Anonymous

    Posted December 10, 2002

    All IT Managers would benefit from this book

    Mr. Camp's IP Telephony Demystified does an excellent job of providing the reader with a managerial and ¿why it matters¿ look at the issues and reasons surrounding the application of IP Telephony. What I appreciated most was the grace and style of dealing with a myriad of complex interrelated aspects of this complicated subject matter area. I especially found Chapter 7, Gateways between Networks, relevant to sorting out the various ILEC, ITSP and Enterprise Models. In addition, Chapter 8, Premise-based Telephony, contains some keen insights not seen in other related books.

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