December 1999
Intermediate to advanced
480 pages
11h 15m
English
book
IP Telephony: Packet-based Multimedia Communications Systems
by Olivier Hersent, David Gurle, Jean-Pierre Petit
Overview
I recommend this book to all VoIP engineers, analysts, and IT
managers who really want to know what they are talking about on the
net, enjoy!"
-Jeff Pulver, founder of the VON (Voice On
the Net) coalition, and the founder and president of pulver.com
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 VoIP 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 VoIP
telephone gateways. The final section on networks addresses Quality
of Service (QoS) issues, explores dimensioning a VoIP network, and
introduces Multicast routing, including a perspective on security
and MBONE applications.
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