Includes bibliographical references and index.

Preface. PART I PRELIMINARIES. 1 Introduction to VoIP Networks. 1.1 Public Switched Telephone Network (PSTN). 1.1.1 Switching. 1.1.2 Routing. 1.1.3 Connection hierarchy. 1.1.4 Telephone numbering. 1.1.5 Signaling. 1.1.6 Summary. 1.2 Fundamentals of Internet technology. 1.2.1 Packetization and packet-switching. 1.2.2 Addressing. 1.2.3 Routing and forwarding. 1.2.4 DNS. 1.3 Performance issues in the Internet. 1.3.1 Latency. 1.3.2 Packet loss. 1.3.3 Jitter. 1.4 Quality of Service (QoS) guarantees. 1.4.1 Integrated services. 1.4.2 Differentiated services. 1.4.3 Other modifications. 1.4.3.1 Route pinning. 1.4.3.2 Packet classification. 1.4.4 Admission control. 1.4.5 Status. 1.5 Summary. 2 Basics of VoIP. 2.1 Packetization of voice. 2.2 Networking technology. 2.3 Architecture overview. 2.3.1 Architectural requirements. 2.3.2 Functional components. 2.3.2.1 VoIP calling device. 2.3.2.2 Gateway. 2.3.2.3 Media server. 2.3.2.4 Session control server. 2.3.3 Protocols. 2.4 Process of making a VoIP call. 2.5 Deployment issues. 2.5.1 VoIP quality and performance issues. 2.5.2 Delay. 2.5.3 Jitter. 2.5.4 Packet loss. 2.5.5 Echo and talk overlap. 2.5.6 Approaches to maintaining VoIP quality. 2.5.6.1 Network-level QoS. 2.5.6.2 VoIP codecs. 2.6 VoIP applications and services. 2.6.1 Fax. 2.6.2 Emergency numbers. 2.6.3 Roaming. 2.6.4 Voice over IM. 2.6.5 Push-to-talk. 2.6.6 Conferencing. 2.6.7 Integration with other applications. 2.7 Summary. 3 VoIP Codecs. 3.1 Codec design overview. 3.1.1 VoIP codec design goals. 3.2 Speech coding techniques. 3.2.1 Waveform codecs. 3.2.1.1 Pulse code modulation (PCM). 3.2.1.2 Differential PCM (DPCM). 3.2.2 Source coding. 3.2.3 Hybrid coding. 3.2.4 Adaptive multirate. 3.3 Narrowband codecs. 3.3.1 PCM-based G.711. 3.3.2 ADPCM-based G.721 codecs

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 IP describes 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. It details new technologies such as P2P technology, VoWiFi, WiMax, and 3G Networks. It explains the QoS issues arising from deploying VoIP using the new technologies. It 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.