IP Telephony: Deploying Voice-over-IP Protocols

By Olivier Hersent, Jean-Pierre Petit, David Gurle

Book Overview

IP (internet protocol) Telephony, enabled by softswitches, is going to usher in a new era in telecommunications. By putting voice and data over one IP network, operators can enjoy lower costs and create new, revenue-generating "multimedia" services. This valuable reference offers a comprehensive overview of the technology behind IP telephony and offers essential information to network engineers, designers and managers who need to understand the protocols and explore the issues involved in migrating the existing telephony infrastructure to an IP-based real time communication service. Drawing on extensive research and practical development experience in VoIP from its earliest stages, the authors give access to all the relevant standards and cutting-edge techniques in a single resource. IP Telephony: Deploying Voice-over-IP Protocols: Assumes a working knowledge of IP and networking and addresses the technical aspects of real-time communication over IP. Presents a high level overview of packet media transport technologies, covering all the major VoIP protocols - SIP, H323 and MGCP Details specific strategies to design services for public networks where endpoints cannot be trusted and can be behind firewalls. Explores the problems that may arise from incomplete protocol implementations, or architectures optimized for private networks which fail in a public environment. This amply illustrated, state-of-the art reference tool will be an invaluable resource for all those involved in the practical deployment of VoIP technology.

• Format: Hardcover
• Language: English
• ISBN: 0470023597
• ISBN13: 9780470023594
• Release Date: March 2005
• Publisher: Wiley
• Length: 416 Pages
• Weight: 1.91 lbs.
• Dimensions: 9.7" x 1.1" x 6.9"

Customer Reviews

A good source for seriuos VoIP technology, for engineers

In my opinion this is a very serious descriptive book, for Voice over IP standards. I work in an chilean operator, and the book clarified me regarding the state-of-the-art of these technologies, and give me a good theoretical background.Currently there are many confusion regarding this field, because the different proposed standards. This book cover H.323, SIP and MGCP. Although some of them were not completely published a the writing-time, the protocols are very well explained (including some message exchange between devices).There are some chapters over Voice Coding and Quality of Service, which will be very interesting for any engineer who is planning a real deployment. Chapter 7 is for Network Planning (very useful).This is a technical book, recommendable for engineers, with a good networking knowledge. Until now, is the most serious book I have found regarding this topic.

Comprehensive overview of IP Telephony

This book is a very good overview of IP Telephony and other related technologies such as multicasting network and quality over service. I am a software developer and not the telecommunication engineer, and surprsingly the book helps me a lot in understanding IP Telephony as a software developer. First part of the book explains three standards H.323 of ITU, SIP of IETF, and MGCP. Second part explains Voice Technology, and finally , the third part explains Network part. They are explained quite clearly and the writers not only know what they are saying, but also they know how to say it right. Although I do give 5 stars , I prefer to give this book 4.5 stars since I don't think one can undestand the book if they have not read the H.323 specification before, have no idea about multicasting, ISDN, SS7, RTP/RTCP. So, if you have no idea about all of the issues..., I don't think this book will help you. Read H.323 specification, IP multicasting, RTP/RTCP (or other multimedia and networking), QoS, before and then read this book. It does not mean that you have to understand all the stuffs, just a little knowledge for dummies for each is enough.

Excellent VoIP Book!

This book has the best description of RTP, H.323, SIP and MGCP I have seen yet. It's sufficiently technical that it answers what a programmer needs, yet it's at a level higher that the actual specs so you can quickly arrive at a high-level understanding.I personally found it on the bookshelf at a local store and thought it worth the risk of a purchase... and I find that my money was very well spent indeed. I highly recommend it to anyone who is not already an expert Internet Telephony.