Book Description
More and more businesses today have their receive phone service through Internet instead of local phone company lines. Many businesses are also using their internal local and wide-area network infrastructure to replace legacy enterprise telephone networks. This migration to a single network carrying voice and data is called convergence, and it's revolutionizing the world of telecommunications by slashing costs and empowering users. The technology of families driving this convergence is called VoIP, or Voice over IP.
VoIP has advanced Internet-based telephony to a viable solution, piquing the interest of companies small and large. The primary reason for migrating to VoIP is cost, as it equalizes the costs of long distance calls, local calls, and e-mails to fractions of a penny per use. But the real enterprise turn-on is how VoIP empowers businesses to mold and customize telecom and datacom solutions using a single, cohesive networking platform. These business drivers are so compelling that legacy telephony is going the way of the dinosaur, yielding to Voice over IP as the dominant enterprise communications paradigm.
Developed from real-world experience by a senior developer, O'Reilly's Switching to VoIP provides solutions for the most common VoIP migration challenges. So if you're a network professional who is migrating from a traditional telephony system to a modern, feature-rich network, this book is a must-have. You'll discover the strengths and weaknesses of circuit-switched and packet-switched networks, how VoIP systems impact network infrastructure, as well as solutions for common challenges involved with IP voice migrations. Among the challenges discussed and projects presented:
- building a softPBX
- configuring IP phones
- ensuring quality of service
- scalability
- standards-compliance
- topological considerations
- coordinating a complete system ?switchover?
- migrating applications like voicemail and directory services
- retro-interfacing to traditional telephony
- supporting mobile users
- security and survivability
- dealing with the challenges of NAT
To help you grasp the core principles at work, Switching to VoIP uses a combination of strategy and hands-on "how-to" that introduce VoIP routers and media gateways, various makes of IP telephone equipment, legacy analog phones, IPTables and Linux firewalls, and the Asterisk open source PBX software by Digium. You'll learn how to build an IP-based or legacy-compatible phone system and voicemail system complete with e-mail integration while becoming familiar with VoIP protocols and devices. Switching to VoIP remains vendor-neutral and advocates standards, not brands. Some of the standards explored include:
- SIP
- H.323, SCCP, and IAX
- Voice codecs
- 802.3af
- Type of Service, IP precedence, DiffServ, and RSVP
- 802.1a/b/g WLAN
If VoIP has your attention, like so many others, then Switching to VoIP will help you build your own system, install it, and begin making calls. It's the only thing left between you and a modern telecom network.
Customer Reviews:
Nice introduction to VoIP.......2007-06-23
provided me a smooth introduction to the various components that make up a VoIP network...the projects at the end of the chapters were very good to guide you through the domain.
A very thorough introduction.......2007-01-23
I can't say this book will answer every question you might have about every piece of VoIP hardware on the market today, but it does a pretty good job of building an understanding of the core concepts shared amongst all the brand names so that you can make the jump from general to specific without too much hair pulling. If any specific product is given more attention than others, it's Asterisk, but that's not only welcome, it's unavoidable given the subject matter. The treatment it receives here also beats the everloving tar out of the O'Reilly book dedicated to Asterisk exclusively.
Good choice for investigating VoIP for your organization..........2005-08-23
It seems like Voice over Internet Protocol, aka VoIP, is starting to become much more mainstream. Not only are businesses switching over, but now you can set up your home phone access to use VoIP (aka "broadband") technology. Ted Wallingford has done a nice job in explaining the business side of the possibilities in the book Switching to VoIP - A Solutions Manual for Network Professionals.
Contents: Voice and Data - Two Separate Worlds?; Voice over Data - Many Conversations, One Network; Linux as a PBX; Circuit-Switched Telephony; Enterprise Telephone Applications; Replacing the Voice Circuit with VoIP; Replacing Call Signaling with VoIP; VoIP Readiness; Quality of Service; Security and Monitoring; Troubleshooting Tools; PSTN Trunks; Network Infrastructure for VoIP; Traditional Apps on the Converged Network; What Can Go Wrong?; VoIP Vendors and Services; Asterisk Reference; SIP Methods and Responses; AGI Commands; Asterisk Manager Socket API Syntax; Glossary; Index
I think the biggest thing to keep in mind when approaching this book is the target audience. While there are a few books out there on "internet telephones" that talk to the consumer, this isn't one of them. The tag line of "for Network Professionals" is the key here. While you don't have to be a network guru to read this book, some level of familiarity with network and telephony concepts would help. Someone either working with the communication systems in a company or heading up a communications department would be a perfect match here. You'd probably even do alright if you just have an interest in the subject, as Wellingford does a good job taking what can be complex material and making it understandable. An admirable task in itself...
What makes this book stand out from other books I'd expect to see is that it doesn't just dwell on jargon and theory. There are a number of projects included in the book so you can get your hands dirty actually working with the technology. Add to that the fact that the author uses an open source PBX system called Asterisk for the exercises. So now you have no reason in terms of cost for not diving right in.
Although I'm not necessarily the target audience for this book, I'd have no problem recommending it to someone looking for material that covers this subject. The book is very well written, and after finishing it you should have a very firm grasp of the essentials. You might even know enough to start yourself on your next career path... :)
Great book.......2005-08-12
This book provides a comprehensive look at not only VoIP, but all related legacy telephony systems it may interact with or replace. A wonderful resource for anyone considering a VoIP deployment either at the office or at home. The technical detail and background the author provides in his examples and background information is incredibly helpful. I definately recommend..
Pretty Good.......2005-08-05
As the telcom manager for a rather large enterprise (45,000 users) I try to keep up on the various books on VoIP and this one is pretty good. It is designed towards someone who is knowledgeable about voice and data but not necessarily someone how is an expert in either subject. It also does a very good job of not focusing on any one type of technology but covers H.323, SIP and Cisco amongst many others and gives you a good sense of each flavor that is available. I would recommend it for anyone looking to deploy VoIP.
Book Description
Bypassing the old circuit-switched hardware, softswitches streamline message traffic and provide a much more efficient service development environment. Along with SIP, this technology leverages Internet technologies to replace plain-old-telephone service. Developers who are freed up by softswitch technology to build cost-effective 3G serives will learn how it works and what applications it can support. Network managers making hard decisions about whether to deploy VoIP will learn pros and cons, costs and benefits, and most importantly how to separate myth from reality.
Customer Reviews:
Softswitch kind of explained.......2005-06-27
This book, sometimes gets it right and sometimes doesnt. The graphics are not great and they should be. Some of the tables employed are not significant enough to explain the points started. I think this book takes a small bite when it should be taking a large chunk out of explaining the subject matter.
Softswitch at your own risk!.......2004-12-20
I got this book because the book claims to evaluate softswitch advantages as a Class 4 replacement. I work for a telecommunications company and one of our projects was to expand our long distance capability at the lowest costs possible. We evaluated the softswitches out there and determined the technology had not matured enough to replace hardware switches.
This book does explain the architecture and protocols, and for many SOHO's out there, it is a viable alternative. However, this book is deceptive in claiming that there is no reason not to immediately migrate from circuit switched Class 4 to a softswitch Class 4. After reading this book I believed that only configuration errors would stop migration, but my personal experience differs from the author.
I have experience to know that the softswitch products out there are either good for small scale migrations or as a MUX between real circuit switch hardware. Claims of Class 4 replacements are vaporware.
Because this book was the first one about softswitch does not make this a 5 star book. There is better white pages out there and sales literature that is better, and more realistic, than this book. I think the 5 star reviews are either shills or someone who has not read this book.
Did I just buy a sales presentation?.......2004-12-09
It was not until after I purchased this book and started to read it did I discover that the author "has many years experience in sales of VoIP and softswitch platforms." It shows. This book does not read like a major reference and learning tool, but more like a sales seminar only to answer potential customer's objections on softswitch technology.
I am a senior technician in a major telecommunications company. I have worked on several softswitch platforms from several vendors. I have hands-on experience in both the lab and live environments, and was hoping this book to be a valuable resource on softswitch technology.
There is a bullet point on the cover of the book, "Risks and payoffs" so I anticipated real world failings of softswitch issues and techniques to overcome them. Only minor theoretical "risks" are identified but quickly dismissed with a "car salesman" answer. Nothing substantial at all.
The book is adequate in discussing the protocols used in the VoIP and SIP environments. It is far lacking in the real world application of these protocols. It also fails in the argument that softswitch products are currently are as reliable as any major class 4/5 switch available. On a similiar vein, it appears that the figures used in the economic value chapter are best guesstimates of a salesman, not real world success stories. I can give the author several examples, one being a major US university, of organizations that attempted to migrate to softswitch, and pulled back after it was determined to be a major loss with no end in sight. They pulled back and remained with the legacy system.
In their current state, I would not dare replace my most important class 5 offices with a softswitch. For the near future, the 5ESS, DMS, or even the AXE are far superior products in providing class 5 services. This book could be a valuable reference if the hype was balanced with a more realistic assessment of current softswitch offerings.
I finished this book feeling like I watched a football game, but instead of listening to the professional analysis from the play-by-play announcer, the audio was fed in from the cheerleading squad.
Repetition is the Key for this book.......2004-11-26
The book can be interesting for anyone wants a first contact with Voip technology, however, the constant repetitions in the text, such as the countless mentions of the "Lucent 5ESS 3500 features", the "Clayton Christiensen axiom" and many others, make reading this book an extremely boring experience. I estimate that a basic review of the text for a second edition, can cut off roughly 10% of the text (and hopefully, the price too).
The only reference for softswitch.......2004-09-04
We get a lot of inquiries from our corporate customers asking if and how they should transition to VoIP. Usually, we send them a copy of this book and we always get the contract to switch over the customer to a VoIP infrastructure. This book has done wonders for our business.
Customer Reviews:
Most people will not like this book.......2005-03-03
This book will not teach most readers anything practical about VOIP. I am a CCNP, with a BSEE and Masters degree, and this is the first technical book that I have come across in a long time that will not give me even a single paragraph of useful information that I can deliver to my class room of technical students who want to learn more about VOIP. The only value I can find so far, is that the author references a bunch of RFCs that are related to VOIP. Since this author is probably going to keep writing books, here is my message to the author. You probably dedicated many years of your life to VOIP and related subjects, and perhaps this makes you an "expert". But the average technical person in the world would greatly appreciate a layman's term high level introduction paragraph or 2, to each and every single technical subject that you are going to talk about, before you start rattling off protocols like H.248 vs H.245 vs H.323 vs H.225 like on page 4 of your book. My only consolation to having purchased this horrible book is that I bought an inexpensive used one, right here on Amazon. This book had nothing but 5 stars by the previous Amazon reviewers and I trusted their judgement. Boy are they wrong! Amazon has advertized that a book called VOIP for DUMMys will be released in June 2005 and I cant wait for this book to be available. Unfortunately, my class begins next week, so I will be forced to use the dry Cisco books.
The IP infrastructure is still work in progress.......2003-09-05
We have spent the better part of the last seven years trying to create a nationwide infrastructure to support IP services and applications. In spite of the great progress, this is still work in progress. A large question still exists. How are we dealing with the physical and security limitations of packet technologies in the wide area? Some of these early concerns were covered in my first book "IP Telephony, The integration of robust VoIP services", sponsored by Hewlett-Packard / Agilent Technologies and published by Prentice-Hall. But that was only the beginning...there is a lot more work that needs to be done before we can safely say we have hit the target of ubiquitous "seamless integration" of applications and services...and let's not forget that in the end, we will have to address the manner in which we access and manipulate large scale and distributed data across the wide area.
In my second book I cover SIP, H.323, SCTP, MGCP, H.248 and other IP protocols with interoperability test cases and call flows. Understanding the enormity of protocol interoperability is only half the battle. The other half is choosing the architecture that will deliver the performance and product features. The new battlefield the will determine the feasibility of a lot of new network designs will be around data access and manipulation. IT systems and network systems tend to want to blend into each other, but can it be done with the state of the art in data base design? More to come...Enjoy the book.
Bill
Average customer rating:
- Nice intro to VOIP services
- I saved money
- Good Primer for Broadband Phone Service
- Well done introduction to Internet telephony for home
- Say good-bye to Ma Bell...
|
Talk Is Cheap: Switching to Internet Telephones
James Gaskin
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Skype Me!: From Single User to Small Enterprise and Beyond
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Switching to VoIP
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Skype(TM): The Definitive Guide
ASIN: 0596009607 |
Book Description
Fed up with the high tolls charged by your ordinary telephone service? If you're itching to cut the copper cord with your costly, traditional phone service, you need Talk is Cheap, the new, easy-to-understand guide to understanding and using Voice over Internet Protocol (VoIP) and other Internet telephone options. Technologies such as VoIP are gaining a great deal of attention these days as more people switch from standard telephone service to phone service via the Internet. But while the cost savings are outstanding, there are some issues with Internet telephony that you should know about. Are the connections reliable? Is the quality comparable? Will it include 911 services? James Gaskin's Talk is Cheap addresses these issues and many more by explaining how to make the switch and what the tradeoffs will be if you opt for Internet telephony over traditional phone services. Talk is Cheap focuses on the increasingly popular services from Vonage, which uses VoIP, and Skype--a free service that operates as a peer-to-peer (P2P) network with the ability to turn any PC, Mac, or Pocket PC into a telephone. The book explains your options; explores the background behind, the workings of, and differences between VoIP and P2P networks; and discusses the advantages and drawbacks of both technologies (including service offerings, quality, capabilities, completion rates, and more). Talk is Cheap then goes into detail on what you can expect in Internet service from traditional phone companies such as Verizon and AT&T. In addition, you will learn more advanced techniques, including how to turn your Palm or Pocket PC into an Internet phone and how to work with Wi-Fi phones and videophones. A straightforward, quick introduction to the ins and outs of using Internet telephone services, this book provides everything you need to make informed telephone decisions--whether you're thinking about the switch from traditional phone service or have already made it and want to get the most out of your new Internet telephone.
Customer Reviews:
Nice intro to VOIP services.......2005-12-09
Now that there are alternatives to using Ma Bell, people are switching (or contemplating it) to broadband phone services. Granted, those on dialup are still out of luck, but some of the services offered provide motivation to get a broadband account. With the proliferation of broadband phone companies, it gets confusing when trying to decide which service is the best, or which one offers the options you need most.
This book explains the services that broadband companies like VONAGE offer, as well as the ones that companies like Skype offer. It also explains (in the first chapter) how internet phones work, as well as an explanation how Voice Over IP works. I also liked the analogy about how innovation over the years has forced traditional phone companies however grudgingly to offer better service. It makes one wonder how they eventually will adapt to VOIP.
There's also a chapter devoted to features that you now pay for that you can get for free using an Internet phone (several of them are the various fees your phone company adds on to your bill), such as call waiting and forwarding. I find it interesting how the phone company manages to slip in various fees as a "cost of doing business."
911 service is also touched upon. Broadband phones will likely have complete 911 service within the next two years, whereas their computer-centric counterparts may not for a few years. It seems to be one drawback to using this type of technology, but one that will likely be ironed out the more popular this technology becomes.
This is a great "consumer guide" to Internet telephony, one that you should buy if you're considering the move to Internet phones.
I saved money.......2005-10-04
I'm a prime candidate for using voice over Internet (VOIP), so it was with much interest that I dove into this book. The first few chapters are background information describing VOIP, how it works, and how it is different (and the same) as landline phone service. There is even a comparison of what you might pay in each case.
Since there are a myriad of choices in the VOIP universe I was glad to see a clear (and sometimes humorous) explanation as to what each offers. It helped me select which way to go for my own personal situation. Implementing the information from this book is saving me at least $10 a month initially and perhaps a lot more in the future.
Anyone wanting to adopt VOIP should read Talk is Cheap before deciding which (if any) provider to use.
Good Primer for Broadband Phone Service.......2005-09-28
This book happened to arrive on my doorstep while I was doing my own researching on switching my traditional phone service over to Broadband. I had a lot of questions, and this book does a good job of providing answers to many common questions and technical details behind making the switch.
The author goes into great detail on both telephone-type broadband service (Vonage, one of the author's favorites) and computer-based Softphone systems (Skype, for example). He explains various packages, benefits and technical details behind each. For example, I want to keep my traditional telephones since for some reason my 15-year old, as computer-savy as he is, seems to have this need to "grasp" onto a traditional telephone receiver. Thanks to this book, I now know how to hook-up those phones (directly to the router provided by the broadband provider) and how to make sure that I maintain my current coverage throughout the house (get a base station phone setup with remote stations). I also found out a lot about how the services that are available as they compare to my traditional phone company today, and some of the pitfalls as well -- Fax machines don't work with broadband service without an extra fee from most providers, and my ADT alarm system is going to need to be retrofitted.
If you are curious as to how broaband phones work (and also want a short, but good overview of how traditional phones work) the author starts the book off with going behind the scenes to explain the details. How does my call from my broadband phone reach my mother, who still believes that computers are those strange machines in the basements of banks and other big companies that manage to overcharge her, who still uses a service provided by Ma Bell? How can I live in Missouri, but have a number in Las Vegas? How can I go on a month-long vacation and still receive all my phone calls? How many licks does it take to get to the center of a Tootsie-Roll pop? Ok, so maybe the author doesn't cover that last one.
About the only gripe I had with this book was the author does a lot of moaning about the traditional phone companies. I am no big fan either, but I still realize they are necessary and will be so for many, many years to come. I also would have liked to seen a little less emphasis given to just Vonage and Skype, though to be fair they are the major market players at this stage in the game.
A good read for those considering making the switch. It's written well and is it times humorous which makes for a very easy read.
Well done introduction to Internet telephony for home.......2005-08-28
With Internet Telephony gathering acceptance and converts daily many people are trying to figure out what service will work best for them and the differences between the various offerings. With a straight-forward analysis of Internet telephony as compared to traditional phone lines and the various options available, this book is well done and very informative. I happen to use one of the services mentioned in the book and found the author's review of it right on the mark. He provided an excellent discussion of the differences between a broadband phone-centric service and a computer-centric service as well as the offerings of specific vendors. If you are thinking about making the move to Internet telephony this book will provide you with sufficient background information to determine if it would be useful for your needs as well as how to shop intelligently for the appropriate product. Although the information also applies to small businesses this book is aimed squarely at the home market. Written in a very non-technical style Talk is Cheap is easy to read and understand and suggested for anyone interested in learning about the subject.
Say good-bye to Ma Bell..........2005-07-25
Want to say good-bye to your plain old telephone service with the high cost of taxes, add-on fees, and long-distance? Check out James E. Gaskin's book Talk Is Cheap - Switching To Internet Telephones (O'Reilly). I certainly learned quite a bit from this book...
Contents: How Internet Telephone Calls Work; Your Internet Phone; Free Internet Phone Features That You're Paying For Now; Choosing Your Internet Phone Equipment; Vonage And Other Broadband Phone Carriers; Skype And Other Computer-centric Services; 911, Alarms, And Other Outgoing Calls; Tips, Tricks, And Techniques For Advanced Users; Go Wireless; Index
As more and more people switch to broadband internet access, there's an emerging option for telephony services in the home. Using your internet connection (DSL or cable), you can switch to internet telephony, also known as Voice over Internet Protocol (VoIP) and go all digital. Gaskin does an excellent job in explaining exactly what this is, how it works, and the pros and cons of switching to a service like this. He's a pretty strong advocate of VoIP, so you can pretty much figure out where his bias is going to lie.
The book focuses on two major types of internet telephony: phone-centric and computer-centric. In the phone-centric area (using your phone much like before, but only through an internet service) he uses Vonage as the primary example of what to expect. On the computer-centric side (no telephone, just headphones and speakers attached to your computer), he uses the Skype package as the leader in that area. In this growing technology area, it's impossible to write a book covering every option such that it won't be out of date before it's printed. To Gaskin's credit, he does a good job in covering the current playing field, as well as giving enough detail to figure in new options as they emerge.
Even though you can come away from a book like this thinking all is rosy, that's not quite the case. There are very well documented customer service issues with Vonage, and no player in the field is mature enough to get it right as often as Ma Bell does. Still, if you're an early adopter of technology, this is definitely an area you need to check out. And if you have no exposure to residential VoIP up until now, I'd recommend a copy of this book to get you up to speed quickly.
Book Description
This digital document is an article from Federal Computer Market Report, published by Millin Publishing, Inc. on November 26, 2001. The length of the article is 752 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
Citation Details
Title: ADC: HIGHEST-DENSITY VOIP GATEWAY FOR COST-EFFECTIVE FUTURE-PROOF EVOLUTION TO IP CABLE TELEPHONY.(ADC Cuda Packet Telephony Module)(Product Announcement)
Publication:
Federal Computer Market Report (Newsletter)
Date: November 26, 2001
Publisher: Millin Publishing, Inc.
Volume: 25
Issue: 22
Page: 8
Article Type: Product Announcement
Distributed by Thomson Gale
Book Description
This digital document is an article from EDP Weekly's IT Monitor, published by Millin Publishing, Inc. on November 26, 2001. The length of the article is 752 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
Citation Details
Title: ADC: HIGHEST-DENSITY VOIP GATEWAY FOR COST-EFFECTIVE FUTURE-PROOF EVOLUTION TO IP CABLE TELEPHONY.(Cuda Packet Telephony Module)(Product Announcement)
Publication:
EDP Weekly's IT Monitor (Magazine/Journal)
Date: November 26, 2001
Publisher: Millin Publishing, Inc.
Volume: 42
Issue: 46
Page: 4
Article Type: Product Announcement
Distributed by Thomson Gale
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Analyze VOIP quality.(voice-over-Internet Protocol): An article from: Communications News
Charles Thompson
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ASIN: B000NOK454
Release Date: 2007-02-16 |
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Citation Details
Title: Analyze VOIP quality.(voice-over-Internet Protocol)
Author: Charles Thompson
Publication:
Communications News (Magazine/Journal)
Date: October 1, 2006
Publisher: Thomson Gale
Volume: 43
Issue: 10
Page: 37(1)
Distributed by Thomson Gale
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Intelligent switching for your VoIP network.(Connectivity): An article from: Computer Technology Review
Joe McClain
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ASIN: B000FDKDG8
Release Date: 2006-04-12 |
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Citation Details
Title: Intelligent switching for your VoIP network.(Connectivity)
Author: Joe McClain
Publication:
Computer Technology Review (Newsletter)
Date: January 1, 2006
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Volume: 27
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MITEL LAUNCHES VOIP SWITCHING CHIPS FOR LANS.(Product Announcement): An article from: LAN Product News
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ASIN: B0008HFH94
Release Date: 2005-07-28 |
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This digital document is an article from LAN Product News, published by Worldwide Videotex on November 1, 2000. The length of the article is 1123 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
Citation Details
Title: MITEL LAUNCHES VOIP SWITCHING CHIPS FOR LANS.(Product Announcement)
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LAN Product News (Newsletter)
Date: November 1, 2000
Publisher: Worldwide Videotex
Volume: 12
Issue: 11
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- A History of the English-Speaking Peoples Since 1900
- CIMA Study Systems 2006: Financial Accounting Fundamentals
- The Political Economy of Trade, Aid and Foreign Investment Policies
- VACANT POSSESSION
Asterisk: The Future of Telephony
VoIP Hacks: Tips & Tools for Internet Telephony (Hacks)
Building Telephony Systems with Asterisk
Taking Charge of Your VoIP Project (Network Business)
Voice over IP Fundamentals (2nd Edition) (Fundamentals)
