Voice over IP Fundamentals (2nd Edition) (Fundamentals) | 
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Product Description
A systematic approach to understanding the basics of voice over IP  Understand the basics of enterprise and public telephony networking, IP networking, and how voice is transported over IP networks Learn the various caveats of converging voice and data networks Examine the basic VoIP signaling protocols (H.323, MGCP/H.248, SIP) and primary legacy voice signaling protocols (ISDN, C7/SS7) Explore how VoIP can run the same applications as the existing telephony system but in a more cost-efficient and scalable manner Delve into such VoIP topics as jitter, latency, packet loss, codecs, QoS tools, and security  Voice over IP (VoIP) has become an important factor in network communications, promising lower operational costs, greater flexibility, and a variety of enhanced applications. To help you understand VoIP networks, Voice over IP Fundamentals provides a thorough introduction to the basics of VoIP.  Voice over IP Fundamentals explains how a basic IP telephony infrastructure is built and works today, major concepts concerning voice and data networking, and transmission of voice over data networks. You’ll learn how voice is signaled through legacy telephone networks, how IP signaling protocols are used to interoperate with current telephony systems, and how to ensure good voice quality using quality of service (QoS).  Even though Voice over IP Fundamentals is written for anyone seeking to understand how to use IP to transport voice, its target audience comprises both voice and data networking professionals. In the past, professionals working in voice and data networking did not have to understand each other’s roles. However, in this world of time-division multiplexing (TDM) and IP convergence, it is important to understand how these technologies work together. Voice over IP Fundamentals explains all the details so that voice experts can understand data networking and data experts can understand voice networking.  The second edition of this best-selling book includes new chapters on the importance of billing and mediation in a VoIP network, security, and the common types of threats inherent when packet voice environments, public switched telephone networks (PSTN), and VoIP interoperate. It also explains enterprise and service-provider applications and services.Â
Amazon.com Review
The authors of Voice over IP Fundamentals--three packet-voice specialists at Cisco Systems--initiate their exploration of next-generation technologies for supporting conversations across large distances: the switched telephone network as implemented on large (intercontinental) and small (building and enterprise) scales. They then point out problems with the old way of doing things and illuminate the standards and regulatory conditions that have made Internet telephony attractive. Signaling System 7 (SS7) gets particularly insightful coverage, with ample graphical support for the clear, fact-rich, example-laden prose. The authors do a great service for readers by breaking packet telephony into its component technologies and explaining each one carefully. Coverage of the various protocols that enable voice over IP, particularly H.323 and Session Initiation Protocol (SIP), is simultaneously clear and deep. The same goes for media gateway protocols and various schemes for translating sounds into digital signals and back again, while retaining maximum clarity. There's even some practical material; concluding chapters diagram Cisco router configurations for voice traffic and flesh out solutions with case studies. You'll like this book if you need to implement a voice over IP system and know more about IP than you do about traditional voice telecommunications. The patient and detailed explanations of traditional telephony concepts and voice over IP protocols will mesh nicely with your existing data communications knowledge, enabling you to make wise design and product decisions. --David Wall Covered topics: The Public Switched Telephone Network (PSTN), signaling specifications (including Bell System, ISDN, and Signaling System 7), the basics of Internet Protocol (IP), modulation and compression of voice, Quality of Service (QoS), H.323, Session Initiation Protocol (SIP), and gateway protocols. Business considerations of Internet telephony are also addressed.
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Customer Reviews:
• Covers The Underlying Technology 29 November, 2006
With companies like Vonage beginning to advertise for broad based end user sales on television, VoIP must have become of age. I do notice, however, that Vonage still charges by the minute. I guess they think that this is what customers are used to paying so why not.
This book is aimed not at the Vonage type end user, but at the technically savvy individual. It aimed at three types: people who know circuit switching and want to know more about packet switching, people who know packet switching and want to know more about circuit switching, computer types who know computers but are not expert in communications.
It starts with how the traditional phone system worked and then moves to explain the difference between the old circuit switched system that Ma-Bell developed to the newer packet switched systems of today.
Most of the equipment being discussed is Cisco, as is fitting because it seems that they have just about the most complete line, and because this book is put out by Cisco Press. This is a resonably high level book, it is not intended for the absolute beginner who wants to use VOIP, but at the person who wants to understand the underlying technology. You'll learns lots of new With companies like Vonage beginning to advertise for broad based end user sales on television, VoIP must have become of age. I do notice, however, that Vonage still charges by the minute. I guess they think that this is what customers are used to paying so why not.
This book is aimed not at the Vonage type end user, but at the building of a comprehensive understanding of VoIP and would appeal to the sophisticated home user and to the corporate network engineer charged with moving his company to VoIP. It starts with how the traditional phone system worked and then moves to explain the difference between the old circuit switched system that Ma-Bell developed to the newer packet switched systems of today.
Most of the equipment being discussed is Cisco, as is fitting because it seems that they have just about the most complete line, and because this book is put out by Cisco Press. This is a fairly advanced book. It is not intended for the person who wants to set up a system, but for the person who wants to understand the underlying technology. You'll learn lots of new algorithms.
- Reviewed by customer ID: A1M8PP7MLHNBQB
• Not A Beginners Book 23 March, 2008
I picked this up on a whim and found it rather hard to read due to the level of plain detail. The first few chapters especially about SS7 were exceptionally dry and a bit of a snoozer. They read more like an RFC rather then a teaching tool.
This book does need some prior knowledge. If you are a beginner and lack knowledge about telephony and networks; you will read it and probably not pickup much.
Even towards the end; I found the chapters didn't explain much. More like a list of features.
I found the case studies a little interesting.
The amount of information the authors were attempting to cover needed more detail. This book should have been at least twice it's size with a little more lesson oriented approach.
Overall, it's an ok book. Again if you are a beginner, you should wait and build your knowledge before attempting this book.
- Reviewed by customer ID: AG42CYU5P8NVQ
• A Good Book, But Difficult To Understand 18 June, 2008
This is a good book, but not by my standards. After reading I still did not understand some abstract concepts, I have to find some other books to clarify the confusion. It seems to me it was written for those people who already know the subjects quite well.
- Reviewed by customer ID: A1M06N1UP9MN2J
• Voip Guide 20 January, 2008
Very well written. I am learning quite a bit about VoIP. Highly recommend it.
- Reviewed by customer ID: A3RNGVE6DS7INS
• Like Eating Dry Leaves 02 March, 2008
I've read many certification books, but this one was far and away the driest book I think I've ever read. On every page I'm thinking, "Oh, no - not another page..." The book is great on technical-ese; but the authors don't seem to get it when it comes to readability. No personal notes, no analogies to help keep the reader's interest - only pure technical information, and the more detailed, the better. Woe to you when you get to the SS7 section!
I don't really have anything good to say here, unfortunately. I'm about to order a different CVoice book to study. Anything could only be a step up. If anyone says that this book is easy to read, well, they've been paid by Cisco Press to say it, IMHO.
- Reviewed by customer ID: AAXMNVTT4HITE
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