IP Telephony. Packet-based multimedia communications systems (Relié)

David Gurle, Jean-Pierre Petit, Olivier Hersent

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  • Addison Wesley

  • Paru le : 14/12/2001
  • 1 million de livres à découvrir
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61,00 €
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Internet Telephony is now one of the most important and fastest growing technologies on the Internet, providing a viable technical and economical alternative to current telecommunication networks. Network providers and major companies are thus investigating how this emerging technology can be implemented, and at what cost and savings, in their organizations. This book provides a comprehensive practical overview of the technology behind Internet Telephony, giving essential information to IT professionals who need to understand the background and explore the issues involved in migrating the existing telephony infrastructure to an IP-based real-time communication service. Assuming a working knowledge of IP and ISDN networking, it addresses the technical aspects of real-time applications over IP, with an in-depth coverage of voice and video applications and protocols. Drawing on their extensive research and practical development experience in VolP from its earliest stages, the authors give you access to all the relevant standards and cutting-edge techniques in a single resource. IP Telephony is organized into three clearly structured sections, focusing on protocols, voice technology and networks with a step-by-step approach. The protocols section sets IP telephony in context and then covers H.323, SIP and MGCP in detail, examining in turn their pros and cons, and using examples of particular cases and scenarios. The voice technology section describes voice quality, including the ETSI TIPHON approach, and voice coding, with summary comments on the applicability to VolP telephone gateways. The final section on networks adresses Quality of Service (QoS) issues, explores dimensioning a VolP network, and introduces Multicast routing, including a perspective on security and MBONE applications. Features: detailed, up-to-date coverage of voice and video application and emerging protocol standards: H.323, SIP, MGCP; practical strategies on how to plan and dimension a VolP network; key points to look for in choosing a VolP product and how to avoid common pitfalls in implementation; examples and illustrations of standards and techniques including feedback information on issues discussed at standards meetings; details of QoS issues, Intserv (RSVP), DiffServ, RTP, SDF, companion standards, multimedia coding standards and coding algorithms.
    • H,323 and a general background on IP telephony
    • The session initiation protocol (SIP)
    • Media gateway to media controller protocols (MGCP)
    • Voice quality
    • Voice coding
    • Quality of service
    • Network dimensioning
    • Multicast routing
  • Date de parution : 14/12/2001
  • Editeur : Addison Wesley
  • ISBN : 0-201-61910-5
  • EAN : 9780201619102
  • Présentation : Relié
  • Nb. de pages : 456 pages
  • Poids : 0.895 Kg
  • Dimensions : 17,5 cm × 24,0 cm × 2,6 cm
Olivier Hersent founded the Company NetCentrex with colleagues in 1999. Previously he has worked as a research engineer at France Telecom R&D laboratories (CNET) where he focused on IP security, Multicast and QoS and was also responsible for CNET VolP architectural designs including enhanced H.323 servers. With the emergence of VolP, he has participated in various standards organizations, such as ETSI TIPHON. David Gurle works for Microsoft, having spent two years as the Vice-President of Business Alliances at VocalTec where he lead business development activities and strategic aspects of IP Telephony standardization and technology in IETF, ITU and ETSI. He has also worked for the European Telecommunications Standards Institute, overseeing several standardization committees and founding the TIPHON project and receiving the ETSI Service award. Jean-Pierre Petit is head assistant of a France Télécom R&D (CNET) laboratory involved in speech and audio coding, acoustics, speech recognition, text to speech synthesis and intelligent dialog. He actively contributed to many international standardization processes of speech and audio coders and participated in the definition and implementation of ITU-T and ETSI speech coders such as GSM full rate and G.723.1. He holds several international patents in the digital signal-processing domain and has contributed to a number of international publications.

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IP Telephony. Packet-based multimedia communications systems
61,00 €
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