Voice Over DSL

Ever wish that you could magically turn one phone line into four? Or 12? Or 24? And get high-speed access to the Internet in the bargain? This is the unprecedented opportunity offered by voice over DSL (VoDSL), a technology that truly revitalizes the copper wires that for more than a century have connected all of the world's telephones.

Now, at last, here is a complete guide to VoDSL technology for every IT professional and decision-maker, with content easily accessible to anyone who needs to get up-to-speed fast on the technology and economics of implementing voice and data over DSL.

This book will empower small- and medium-sized businesses that want to inexpensively create a call center or establish a virtual private network for delivering data and voice communications to branch offices and teleworkers.

The author first takes the reader on a short tour of the public telephone and data networks as they have existed in the past and present. He then examines the current realities of VoDSL, presenting comprehensive explanations of each of VoDSL's various guises and carefully detailing their advantages and disadvantages. After a discussion of what to look for in equipment and service providers, some compelling VoDSL-related business applications are presented. The book concludes with a preview of the future of voice and data services, how VoDSL will help usher in the era of the next-generation network, and a look at impending governmental legislation impact on broadband, in general, and VoDSL in particular.

If you're considering dumping your old phone lines and switching to VoDSL, or want to glean some new communications ideas, or simply want a comprehensive reference for the VoDSL system you already own, this book offers the insight and guidance that you need right now.

Table of Contents

Preface

Acknowledgments

Chapter 1 The Evolving Telephone Network

Chapter 2  Data-over-Voice, Voice-over-Data     

Chapter 3  DSL Explained

Chapter 4  VoDSL – The Basics

Chapter   Chapter 5  Four Roads to VoDSL

Chapter   Chapter 6  Customer Premise Equipment

Chapter 7  Considerations When Choosing a Service Provider 

Chapter 8  VoDSL – A Compelling Business Case 

Chapter 9  Why VoDSL Will Succeed

Chapter 10  The Future

Appendix A  The Open Systems Interconnection (OSI) Model 

Appendix B  A Plethora of Protocols 

Glossary 

Index of Figures

書名: VoDSL技術指南

你是否曾經希望能夠將一條電話線神奇地變成四條？或者12條？或者24條？而且還能以優惠價格獲得高速上網？這就是VoDSL（語音數據線路）所提供的前所未有的機會，這項技術真正使連接全球所有電話的銅線焕發了新生，這些銅線已連接了一個多世紀。

現在，終於有了一本完整的VoDSL技術指南，適用於每一位IT專業人士和決策者，內容易於理解，適合任何需要快速了解實施語音和數據在DSL上的技術和經濟的人。

這本書將使希望以低成本建立呼叫中心或為分支機構和遠程工作者提供數據和語音通信的中小型企業能夠自主實現這一目標。

作者首先帶領讀者簡要了解過去和現在的公共電話和數據網絡，然後詳細介紹了VoDSL的現實情況，全面解釋了VoDSL的各種形式，並仔細介紹了它們的優點和缺點。在討論了設備和服務提供商的選擇要點後，書中還介紹了一些引人注目的與VoDSL相關的商業應用。書的最後一部分預覽了語音和數據服務的未來，VoDSL將如何推動下一代網絡的時代，以及即將到來的政府立法對寬帶和VoDSL的影響。

如果你正在考慮放棄舊的電話線，轉而使用VoDSL，或者想獲得一些新的通信思路，或者只是想獲得對你已擁有的VoDSL系統的全面參考，這本書將為你提供所需的洞察力和指導。

目錄

前言

致謝辭

第1章 電話網絡的演變

第2章  數據語音互換，語音數據互換     

第3章  DSL解釋

第4章  VoDSL - 基礎知識

第5章  四種VoDSL的途徑

第6章  客戶端設備

第7章  選擇服務提供商時的考慮因素 

第8章  VoDSL - 一個引人注目的商業案例 

第9章  為什麼VoDSL會成功

第10章  未來展望

附錄```