VoIP (Voice over Internet Protocol), the next big advance in telecom, has proven difficult to implement. This resource gives service and enterprise telecom managers all the data they need on measurements, tools, and utilities to build a Voice over IP service that works as well as the telephone. * Offers specific techniques for evaluating every factor that affects quality of service * Written in an easy-to-understand "plain English" style * Explains how to translate problems of quality into measurable cause and effect

Despite the features that make Voice over IP so attractive from the standpoint of cost and flexibility of telephone services, businesses will only adopt it once they’ve determined whether, and under what circumstances, the quality of VoIP will be satisfactory to users. This hands-on guide supplies you with all the tools you need for VoIP service quality analysis, including explicit directions for: * designing subjective tests and interpreting results * selecting, extending, and applying speech distortion and multiple effects models * examining call set-up times for IP telephony * determining requirements for multimedia exchanges. Without jargon, or tech talk, Hardy delivers solid information on means of measuring, assessing, and improving VoIP quality. He gives you expert information and hands-on specifics, showing you: * The factors that can create a negative caller experience and how packet switching affects them * What to look for in assessing VoIP quality * How to elicit and interpret user evaluations of voice quality * How to estimate likely user perception of voice quality by objective test and analysis * When and how to apply alternative quality measurement techniques to overcome quality shortfalls.

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.

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

An unprecedented look into the present and future of next generation networks, services, and management in the telecommunications industry The telecommunications industry has advanced in rapid, significant, and unpredictable ways into the twenty-first century. Next Generation Telecommunications Networks, Services, and Management guides the global industry and academia even further by providing an in-depth look at current and developing trends, as well as examining the complex issues of developing, introducing, and managing cutting-edge telecommunications technologies. This is an orchestrated set of original chapters written expressly for this book by topic experts from around the globe. It addresses next generation technologies and architectures, with the focus on networks, services, and management. Key topics include: Opportunities and challenges of next generation telecommunications networks, services, and management Tri/Quad Play and IP-based networks and services Fault, Configuration, Accounting, Performance, and Security (FCAPS) requirements Convergence and an important convergence vehicle, IP Multimedia Subsystem (IMS) Next generation operations and network management architecture Ad hoc wireless and sensor networks and their management Next generation operations and network management standards from a strategic perspective A defining look at the future in this field This book will serve as a contemporary reference for the growing global community of telecommunication and information professionals in industry, government, and academia. It will be important to faculty and graduate students of telecommunications as a graduate textbook.

The number of worldwide VoIP customers is well over 38 million. Thanks to the popularity of inexpensive, high-quality services, it's projected to increase to nearly 250 million within the next three years. The VoIP Handbook: Applications, Technologies, Reliability, and Security captures the state of the art in VoIP technology and serves as the comprehensive reference on this soon-to-be ubiquitous technology. It provides: A step-by-step methodology to evaluate VoIP performance prior to network implementation An invaluable overview of implementation challenges and several VoIP multipoint conference systems Unparalleled coverage of design and engineering issues such VoIP traffic, QoS requirements, and VoIP flow As this promising technology’s popularity increases, new demands for improved quality, reduced cost, and seamless operation will continue to increase. Edited by preeminent wireless communications experts Ahson and Illyas, the VoIP Handbook guides you to successful deployment.

This volume constitutes the refereed proceedings of the International Conferences, BSBT, MulGraB and IUrC 2012, held as part of the Future Generation Information Technology Conference, FGIT 2012, Gangneung, Korea, in December 2012. The papers presented were carefully reviewed and selected from numerous submissions and focus on the various aspects of multimedia, computer graphics and broadcasting, bio-science and bio-technology, and intelligent urban computing.

This book provides a collection of 15 excellent studies of Voice over IP (VoIP) technologies. While VoIP is undoubtedly a powerful and innovative communication tool for everyone, voice communication over the Internet is inherently less reliable than the public switched telephone network, because the Internet functions as a best-effort network without Quality of Service guarantee and voice data cannot be retransmitted. This book introduces research strategies that address various issues with the aim of enhancing VoIP quality. We hope that you will enjoy reading these diverse studies, and that the book will provide you with a lot of useful information about current VoIP technology research.

Written from an operator’s viewpoint, HSPA Performance and Evolution explores the lessons learned and techniques developed for optimally deploying HSPA (High Speed Packet Access). The essential distinctions between rolling out HSPA compared to earlier UMTS and GSM technologies are explained covering the many issues that must be specifically handled. Areas in standards which have been left open for interpretation, causing significant differences between vendor implementations, are identified and solutions explored. This book is invaluable in enabling wireless operators to extract maximum performance offered by 3GPP’s HSPA radio technology, consisting of both downlink (HSDPA) and uplink (HSUPA) elements. It focuses on real-world performance, sharing practical implementation methods and tradeoffs for deploying, optimizing and maintaining networks using the HSPA air interface. Examines algorithms, equipment and performance perspectives to identify and explain HSPA Measures performance and sets network parameters for optimal tradeoffs Presents results from practical and real-world network performances Explores the evolution of HSPA technology into HSPA+ and eventually next generation LTE technologies