Voice Over Packet Networks

One of the hottest topics in the telecommuncations industry today is the migration of voice traffic from the circuit switched Telco networks to packet switched networks such as IP, ATM, Frame Relay and access technologies such as DSL (Digital Subscriber Line) and Packet Cable. The sheer volume of voice traffic, together with the efficiencies of packet transport and the opportunity to offer new features on voice calls, has made internetworking, between circuit and packet transport, vital while this migration is in progress. Presents a concise treatment of a complex subject providing up-to-date coverage of all relevant packet voice technologies and an evaluation of how they compare Explains how and why to transport voice over packet networks Includes MEGACO: Media Gateway Control Protocol, Voice over Packet Cable and Voice over DSL Enables the reader to obtain information rapidly by featuring numerous bulleted lists and extensive diagrams Voice over Packet Networks is comprehensive and compact and will be welcomed by both engineers and planners in the telecommunications industry, as well as graduate and senior undergraduate students on telecommunication courses.

"A system administrator's guide to VoIP technologies"--Cover.

Includes new coverage on the advances in signaling protocols,second-generation switching and the development of non-switchedalternatives, and the implementation lessons learned. Contains in-depth coverage of network architectures used tosupport VoIP, performance and voice quality considerations,compression and integration methods for IP tranmissions.

Go under the hood of an operating Voice over IP network, and build your knowledge of the protocols and architectures used by this Internet telephony technology. With this concise guide, you{u2019}ll learn about services involved in VoIP and get a first-hand view of network data packets from the time the phones boot through calls and subsequent connection teardown. With packet captures available on the companion website, this book is ideal whether you{u2019}re an instructor, student, or professional looking to boost your skill set. Each chapter includes a set of review questions, as well as practical, hands-on lab exercises. Learn the requirements for deploying packetized voice and video Understand traditional telephony concepts, including local loop, tip and ring, and T carriers Explore the Session Initiation Protocol (SIP), VoIP{u2019}s primary signaling protocol Learn the operations and fields for VoIP{u2019}s standardized RTP and RTCP transport protocols Delve into voice and video codecs for converting analog data to digital format for transmission Get familiar with Communications Systems H.323, SIP{u2019}s widely used predecessor Examine the Skinny Client Control Protocol used in Cisco VoIP phones in networks around the world.

Previous ed. by Jonathan Davidson, James Peters, 2000.

Written by Cisco "RM" CCIEs "TM, " Technical Marketing Engineers, and Systems Engineers who have real-life experience with Cisco "RM" VoIP networks, this guide includes coverage of Virtual Private Networks (VPNs), admission control, security, fax and modem traffic, and unified messaging. Learn from real-world scenarios.

Seminar paper from the year 2005 in the subject Computer Science - Commercial Information Technology, grade: A (1,3), University of Auckland (Facultiy of Computing), course: Network and Protocols, 10 entries in the bibliography, language: English, abstract: Voice over IP (VoIP) is at the moment one of the most discussed topics in the current network scene. Besides the theoretical interest in network development, there is always the practical relevance which is of high importance for advances in network technology. One major proof, that VoIP research and its technology has a high impact on businesses is the fact that VoIP it is already implemented in a number of companies in the United States of America, UK, Ireland and South Korea, according to Cherry (2005). The following graphic shows the importance of VoIP for companies according to a recent international study conducted by Network Computing.

For networking and RF/wireless engineers, and graduate students who want a solid overview of voice over WLANs/VoIP technology (wireless local area networks / voice over internet protocol), this book covers voice coding, packet loss, delay and 'jitter', and 'echo' control, and shows how to combine both WLAN and VoIP technology to create effective voice over WLAN systems. Finneran also describes how to integrate voice over WLAN systems with cellular networks. This is not just another WLAN-only book nor a VoIP-only book; instead, it integrates both topics into a coherent whole. * Gives complete details on integrating voice and data services on WLANs, including wide area networks * Explores quality of service (QoS) and security issues * Step-by-step descriptions of how to plan and implement voice over WLAN networks

This book addresses three important issues in VoIP networks: Quality of Service, pricing and security. In addressing Quality of Service (QoS), it introduces the notion of delay not exceeding an upper limit, termed the bounded delay, to measure the Quality of Service in VoIP networks. Queuing models are introduced to measure performance in terms of bounded delays. Closed form solutions relating the impact of bounding delays on throughput of VoIP traffic are provided. Traffic that exceeds the delay threshold is treated as lost throughput. The results addressed can be used in scaling resources in a VoIP network for different thresholds of acceptable delays. Both single and multiple switching points are addressed. The same notion and analysis are also applied on jitter, another important indicator of the VoIP QoS This book also develops a pricing model based on the Quality of Service provided in VoIP networks. It presents the impact of quality of VoIP service demanded by the customer on the transmission resources required by the network using an analytical approach. In addition, it extends and applies the delay throughput analysis developed for VoIP networks in assessing the impact of risks constituted by a number of transportation channels, where the risk associated with each channel can be quantified by a known distribution. Finally, the book explores areas for future research that can be built on the foundation of research presented.

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.