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Switching to VoIP

Author : Theodore Wallingford
Publisher : "O'Reilly Media, Inc."
ISBN 13 : 0596517297
Total Pages : 504 pages
Book Rating : 4.5/5 (965 download)

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Book Synopsis Switching to VoIP by : Theodore Wallingford

Download or read book Switching to VoIP written by Theodore Wallingford and published by "O'Reilly Media, Inc.". This book was released on 2005 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 empowersbusinesses 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'lldiscover 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 directoryservices 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.

VoIP

Author : Samrat Ganguly
Publisher : John Wiley & Sons
ISBN 13 : 0470997915
Total Pages : 276 pages
Book Rating : 4.4/5 (79 download)

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Book Synopsis VoIP by : Samrat Ganguly

Download or read book VoIP written by Samrat Ganguly and published by John Wiley & Sons. This book was released on 2008-04-30 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understand how new network technologies impact VoIP! Voice over Internet Protocol (VoIP) is revolutionizing the way people communicate – both in the corporate world and in personal life. The enormous success of VoIP has led to its adoption in a wide range of networking technologies. Each network technology has its unique features and poses distinct challenges for the performance of VoIP. VoIP: Wireless, P2P and New Enterprise Voice over IPdescribes the issues arising in the deployment of VoIP in an emerging heterogeneous network environment. Along with a brief overview of the concepts, protocols, algorithms, and equipment involved in realizing VoIP, this book focuses on two areas: quality and performance issues in deploying VoIP over various network settings, and the new mechanisms and protocols in these emerging networks to assist the deployment of VoIP. VoIP: Wireless, P2P and New Enterprise Voice over IP: Discusses the basics of VoIP, VoIP codecs and VoIP Protocols including SIP and H.323. Details new technologies such as P2P technology, VoWiFi, WiMax, and 3G Networks. Explains the QoS issues arising from deploying VoIP using the new technologies. Solves the performance issues that arise when VoIP is deployed over different network technologies. This book is an invaluable resource for professional network engineers, designers, managers, researchers, decision makers and project managers overseeing VoIP implementations. Market analysts, consultants, and those studying advanced undergraduate and graduate courses on data, voice and multimedia communications will also find this book insightful.

Packet Guide to Voice Over IP

Author : Bruce Hartpence
Publisher : "O'Reilly Media, Inc."
ISBN 13 : 1449339670
Total Pages : 243 pages
Book Rating : 4.4/5 (493 download)

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Book Synopsis Packet Guide to Voice Over IP by : Bruce Hartpence

Download or read book Packet Guide to Voice Over IP written by Bruce Hartpence and published by "O'Reilly Media, Inc.". This book was released on 2013 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A system administrator's guide to VoIP technologies"--Cover.

VoIP: Voice Over Internet Protocol Architecture and Features

Author : Abdul Sattar Mohmand
Publisher : Lulu.com
ISBN 13 : 1435731654
Total Pages : 255 pages
Book Rating : 4.4/5 (357 download)

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Book Synopsis VoIP: Voice Over Internet Protocol Architecture and Features by : Abdul Sattar Mohmand

Download or read book VoIP: Voice Over Internet Protocol Architecture and Features written by Abdul Sattar Mohmand and published by Lulu.com. This book was released on 2008-06-28 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: VoIP or Voice Over Internet Protocol is an emerging telecommunication technology that make use of IP network to carry voice just like PSTN (Public Switched Telephone Network) or traditional phones. There are several companies offering low cost and more flexible phones and packages of VoIP systems. Future belongs to VoIP because of its low cost and flexibility and more control.This innovative technology will change the life of people because the dream of video phone is just behind its bars. This book covers the basic architecture, usefulness, challenges and features of the VoIP Phones systems.

Hacking VoIP

Author : Himanshu Dwivedi
Publisher : No Starch Press
ISBN 13 : 1593271638
Total Pages : 236 pages
Book Rating : 4.5/5 (932 download)

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Book Synopsis Hacking VoIP by : Himanshu Dwivedi

Download or read book Hacking VoIP written by Himanshu Dwivedi and published by No Starch Press. This book was released on 2009 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Voice over Internet Protocol (VoIP) networks, the technology used to place phone calls through the Internet, suffer from the same security holes as standard IP networks. This book reviews the many possible VoIP attacks, and discusses the best defenses against them.

Practical VoIP Security

Author : Thomas Porter CISSP CCNP CCDA CCS
Publisher : Elsevier
ISBN 13 : 0080489559
Total Pages : 592 pages
Book Rating : 4.0/5 (84 download)

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Book Synopsis Practical VoIP Security by : Thomas Porter CISSP CCNP CCDA CCS

Download or read book Practical VoIP Security written by Thomas Porter CISSP CCNP CCDA CCS and published by Elsevier. This book was released on 2006-03-31 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Voice Over IP (VoIP) phone lines now represent over 50% of all new phone line installations. Every one of these new VoIP phone lines and handsets must now be protected from malicious hackers because these devices now reside on the network and are accessible from the Internet just like any server or workstation. This book will cover a wide variety of the publicly available exploit tools and how they can be used specifically against VoIP (Voice over IP) Telephony systems. The book will cover the attack methodologies that are used against the SIP and H.323 protocols as well as VoIP network infrastructure. Significant emphasis will be placed on both attack and defense techniques. This book is designed to be very hands on and scenario intensive · More VoIP phone lines are being installed every day than traditional PBX phone lines · VoIP is vulnerable to the same range of attacks of any network device · VoIP phones can receive as many Spam voice mails as your e-mail can receive Spam e-mails, and as result must have the same types of anti-spam capabilities

VoIP For Dummies

Author : Timothy V. Kelly
Publisher : John Wiley & Sons
ISBN 13 : 1118085523
Total Pages : 312 pages
Book Rating : 4.1/5 (18 download)

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Book Synopsis VoIP For Dummies by : Timothy V. Kelly

Download or read book VoIP For Dummies written by Timothy V. Kelly and published by John Wiley & Sons. This book was released on 2011-05-09 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Put your phone system on your computer network and see the savings See how to get started with VoIP, how it works, and why it saves you money VoIP is techspeak for "voice over Internet protocol," but it could spell "saving big bucks" for your business! Here's where to get the scoop in plain English. Find out how VoIP can save you money, how voice communication travels online, and how to choose the best way to integrate your phone system with your network at home or at the office. Discover how to: Use VoIP for your business or home phone service Choose the best network type Set up VoIP on a wireless network Understand transports and services Demonstrate VoIP's advantages to management

VoIP and Unified Communications

Author : William A. Flanagan
Publisher : John Wiley & Sons
ISBN 13 : 1118166035
Total Pages : 322 pages
Book Rating : 4.1/5 (181 download)

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Book Synopsis VoIP and Unified Communications by : William A. Flanagan

Download or read book VoIP and Unified Communications written by William A. Flanagan and published by John Wiley & Sons. This book was released on 2012-02-27 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Translates technical jargon into practical business communications solutions This book takes readers from traditional voice, fax, video, and data services delivered via separate platforms to a single, unified platform delivering all of these services seamlessly via the Internet. With its clear, jargon-free explanations, the author enables all readers to better understand and assess the growing number of voice over Internet protocol (VoIP) and unified communications (UC) products and services that are available for businesses. VoIP and Unified Communications is based on the author's careful review and synthesis of more than 7,000 pages of published standards as well as a broad range of datasheets, websites, white papers, and webinars. It begins with an introduction to IP technology and then covers such topics as: Packet transmission and switching VoIP signaling and call processing How VoIP and UC are defining the future Interconnections with global services Network management for VoIP and UC This book features a complete chapter dedicated to cost analyses and payback calculations, enabling readers to accurately determine the short- and long-term financial impact of migrating to various VoIP and UC products and services. There's also a chapter detailing major IP systems hardware and software. Throughout the book, diagrams illustrate how various VoIP and UC components and systems work. In addition, the author highlights potential problems and threats to UC services, steering readers away from common pitfalls. Concise and to the point, this text enables readers—from novices to experienced engineers and technical managers—to understand how VoIP and UC really work so that everyone can confidently deal with network engineers, data center gurus, and top management.

SIP

Author : Alan B. Johnston
Publisher : Artech House
ISBN 13 : 9781580536554
Total Pages : 316 pages
Book Rating : 4.5/5 (365 download)

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Book Synopsis SIP by : Alan B. Johnston

Download or read book SIP written by Alan B. Johnston and published by Artech House. This book was released on 2004 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: This newly revised edition of the ground-breaking Artech House bestseller, SIP: Understanding the Session Initiation Protocol gives you a thorough and up-to-date understanding of this revolutionary protocol for call signaling and IP Telephony. The second edition includes brand new discussions on the use of SIP for wireless multimedia communications. It explains how SIP is powerful "rendezvous" protocol that leverages mobility and presence to allow users to communicate using different devices, modes, and services anywhere they are connected to the Internet You learn why SIP has been chosen by the 3GPP (3rd Generation Partnership Program for wireless cell phones) as the core signaling, presence, and instant messaging protocol.

VoIP Voice and Fax Signal Processing

Author : Sivannarayana Nagireddi
Publisher : John Wiley & Sons
ISBN 13 : 0470377860
Total Pages : 592 pages
Book Rating : 4.4/5 (73 download)

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Book Synopsis VoIP Voice and Fax Signal Processing by : Sivannarayana Nagireddi

Download or read book VoIP Voice and Fax Signal Processing written by Sivannarayana Nagireddi and published by John Wiley & Sons. This book was released on 2008-10-03 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete and systematic treatment of signal processing for VoIP voice and fax This book presents a consolidated view and basic approach to signal processing for VoIP voice and fax solutions. It provides readers with complete coverage of the topic, from how things work in voice and fax modules, to signal processing aspects, implementation, and testing. Beginning with an overview of VoIP infrastructure, interfaces, and signals, the book systematically covers: Voice compression Packet loss concealment techniques DTMF detection, generation, and rejection Wideband voice modules operation VoIP Voice-Network bit rate calculations VoIP voice testing Fax over IP and modem over IP Country deviations of PSTN mapped to VoIP VoIP on different processors and architectures Generic VAD-CNG for waveform codecs Echo cancellation Caller ID features in VoIP Packetization—RTP, RTCP, and jitter buffer Clock sources for VoIP applications Fax operation on PSTN, modulations, and fax messages Fax over IP payload formats and bit rate calculations Voice packets jitter with large data packets VoIP voice quality Over 100 questions and answers on voice and more than seventy questions and answers on fax are provided at the back of the book to reinforce the topics covered throughout the text. Additionally, several clarification, interpretation, and discussion sections are included in selected chapters to aide in readers' comprehension. VoIP Voice and Fax Signal Processing is an indispensable resource for professional electrical engineers, voice and fax solution developers, product and deployment support teams, quality assurance and test engineers, and computer engineers. It also serves as a valuable textbook for graduate-level students in electrical engineering and computer engineering courses.

Securing VoIP Networks

Author : Peter Thermos
Publisher : Pearson Education
ISBN 13 : 0132702304
Total Pages : 606 pages
Book Rating : 4.1/5 (327 download)

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Book Synopsis Securing VoIP Networks by : Peter Thermos

Download or read book Securing VoIP Networks written by Peter Thermos and published by Pearson Education. This book was released on 2007-08-01 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Securing VoIP Networks, two leading experts systematically review the security risks and vulnerabilities associated with VoIP networks and offer proven, detailed recommendations for securing them. Drawing on case studies from their own fieldwork, the authors address VoIP security from the perspective of real-world network implementers, managers, and security specialists. The authors identify key threats to VoIP networks, including eavesdropping, unauthorized access, denial of service, masquerading, and fraud; and review vulnerabilities in protocol design, network architecture, software, and system configuration that place networks at risk. They discuss the advantages and tradeoffs associated with protection mechanisms built into SIP, SRTP, and other VoIP protocols; and review key management solutions such as MIKEY and ZRTP. Next, they present a complete security framework for enterprise VoIP networks, and provide detailed architectural guidance for both service providers and enterprise users. 1 Introduction 2 VoIP Architectures and Protocols 3 Threats and Attacks 4 VoIP Vulnerabilites 5 Signaling Protection Mechanisms 6 Media Protection Mechanisms 7 Key Management Mechanisms 8 VoIP and Network Security Controls 9 A Security Framework for Enterprise VoIP Networks 10 Provider Architectures and Security 11 Enterprise Architectures and Security

Speech Quality of VoIP

Author : Alexander Raake
Publisher : John Wiley & Sons
ISBN 13 : 0470032995
Total Pages : 336 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Speech Quality of VoIP by : Alexander Raake

Download or read book Speech Quality of VoIP written by Alexander Raake and published by John Wiley & Sons. This book was released on 2007-01-11 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finally a comprehensive overview of speech quality in VoIP from the user's perspective! Speech Quality of VoIP is an essential guide to assessing the speech quality of VoIP networks, whilst addressing the implications for the design of VoIP networks and systems. This book bridges the gap between the technical network-world and the psychoacoustic world of quality perception. Alexander Raake’s unique perspective combines awareness of the technical characteristics of VoIP networks and original research concerning the perception of speech transmitted across them. Starting from the network designer’s point of view, the different characteristics of the network are addressed, and then linked to features perceived by users. This book provides an overview of the available knowledge on the principal, relevant aspects of speech and speech quality perception, of speech quality assessment, and of transmission properties of telephone and VoIP networks, and of the related perceptual features and resulting speech quality. Discussing new research into the specific time-varying degradations VoIP brings along, but also the considerable potential of quality improvement to be achieved with wideband speech transmission, Alexander Raake demonstrates how network and service characteristics impact on the users perception of quality. Speech Quality of VoIP: Offers an insight into speech quality of VoIP from a user's perspective. Presents an overview of different modelling approaches and a parametric network-planning model for quality prediction in VoIP networks. Draws on innovative new research on the quality degradation characteristic of VoIP. Explains in detail how telephone speech quality can be greatly enhanced with VoIP’s wideband speech transmission capability. Assesses the vast collection of references into the technical and scientific literature related to VoIP quality. Illustrates concepts throughout with mathematical models, algorithms and simulations. Speech Quality of VoIP is the definitive guide for researchers, engineers and network planners working in the field of VoIP, Quality of Service, and speech communication processing in telecommunications. Advanced undergraduate and graduate students on telecommunication and networking courses will also find this text an invaluable resource.

Switching to VoIP

Author : Ted Wallingford
Publisher : "O'Reilly Media, Inc."
ISBN 13 : 0596008686
Total Pages : 505 pages
Book Rating : 4.5/5 (96 download)

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Book Synopsis Switching to VoIP by : Ted Wallingford

Download or read book Switching to VoIP written by Ted Wallingford and published by "O'Reilly Media, Inc.". This book was released on 2005-06-30 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on real-world experience, this handy solutions manual addresses the most common VoIP migration challenges. Find out how to build your own VoIP system, install it, and begin making calls - so you can start saving today. Ideal for IT managers, network engineers, and system administrators.

Scalable VoIP Mobility

Author : Joseph Epstein
Publisher : Newnes
ISBN 13 : 0080949517
Total Pages : 401 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Scalable VoIP Mobility by : Joseph Epstein

Download or read book Scalable VoIP Mobility written by Joseph Epstein and published by Newnes. This book was released on 2009-07-30 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides practical advice on breaking down the implementation and deployment of voice mobility networks within the office, across the campus, and on the road. Offers a complete primer on enterprise-grade Wi-Fi networking for voice mobility at scale, whether as a single-mode or dual-mode network, including information on the newest 802.11n standard and how these standards directly impact voice mobility. Includes methods of integrating existing or new VoIP networks with 3G+, CDMA 2000, WCDMA, HSPA, and WiMAX cellular networks using fixed/mobile convergence (FMC). This book provides a comprehensive examination of IP-based voice mobility, covering every step in deploying multimodal voice mobility networks. Each segment of the entire voice mobility solution is described with an eye towards the inherent problems of high-scale mobility, from wired infrastructure to end device, across multiple networks and technologies. Voice mobility is introduced and defined at a basic level before the book examines the high-level components of a scalable voice mobility solution. Chapters focus on several types of transport networks in greater depth, including voice quality metrics and testing, high-density enterprise Wi-Fi voice networks, cellular networks, and high-level networking technologies. The security of VoIP networks is also considered. The book explores standalone VoIP networks and finally provides an investigation of the current and upcoming set of fixed/mobile convergence approaches. This book is an invaluable guide for anyone looking towards voice mobility as a solution to real-world business problems: IT managers and executives looking to understand the potential for converting offices to all-wireless; network designers and architects planning on rolling out a fully-mobile voice network; and administrators operating or troubleshooting voice mobility networks. Provides practical advice on breaking down the implementation and deployment of voice mobility networks within the office, across the campus, and on the road. Offers a complete primer on enterprise-grade Wi-Fi networking for voice mobility at scale, whether as a single-mode or dual-mode network, including information on the newest 802.11n standard and how these standards directly impact voice mobility. Includes methods of integrating existing or new VoIP networks with 3G+, CDMA 2000, WCDMA, HSPA, and WiMAX cellular networks using fixed/mobile convergence (FMC).

VoIP Technology: Applications and Challenges

Author : Tamal Chakraborty
Publisher : Springer
ISBN 13 : 3319955942
Total Pages : 265 pages
Book Rating : 4.3/5 (199 download)

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Book Synopsis VoIP Technology: Applications and Challenges by : Tamal Chakraborty

Download or read book VoIP Technology: Applications and Challenges written by Tamal Chakraborty and published by Springer. This book was released on 2018-08-03 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers an accessible introduction and practical guide to Voice over Internet Protocol (VoIP) technology, providing readers with the know-how to solve the problems encountered in applying VoIP technology across all types of network. It incorporates the latest research findings and brings readers up to date with the challenges that are faced by researchers developing novel applications of VoIP. The authors discuss the general architecture of VoIP technology, along with its application and relevance in conventional and emerging wireless communication networks, including Wireless Local Area Networks (WLANs), Worldwide Interoperability for Microwave Access (WiMAX), Long Term Evolution (LTE) and Cognitive Radio Networks. The book also includes Quality of service (QoS) studies under dynamic and unpredictable network conditions, which examine the reliability of both legacy systems And the upcoming pervasive computing systems. Further, it explains how the heuristic-based learning algorithms that are used in VoIP communications may help develop today’s technology in the area of autonomous systems. This book is a valuable source of information for academics and researchers, as it provides state-of-theart research in VoIP technology. It is also of interest to network designers, application architects, and service providers looking for a coherent understanding of VoIP across a wide range of devices, network applications and user categories.

VoIP Hacks

Author : Ted Wallingford
Publisher : "O'Reilly Media, Inc."
ISBN 13 : 0596101333
Total Pages : 326 pages
Book Rating : 4.5/5 (961 download)

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Book Synopsis VoIP Hacks by : Ted Wallingford

Download or read book VoIP Hacks written by Ted Wallingford and published by "O'Reilly Media, Inc.". This book was released on 2006 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Voice over Internet Protocol is gaining a lot of attention these days. Both practical and fun, this text provides technology enthusiasts and voice professionals with dozens of hands-on projects for building a VoIP network, including a softPBX.

VOIP Services

Author : United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Telecommunications and the Internet
Publisher :
ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis VOIP Services by : United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Telecommunications and the Internet

Download or read book VOIP Services written by United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Telecommunications and the Internet and published by . This book was released on 2004 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: