Voice over Ip - Hardcover

Black, Uyless D.; Black, Uyless

Hardcover

ISBN 10: 0130224634 ISBN 13: 9780130224637

Publisher: Prentice Hall, 1999

Presents the answers to configuration and troubleshooting problems, both basic and advanced concepts. Designed to get your voice over IP networks up and running. DLC: Internet telephony.

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Review:

In his most recent book, Voice Over IP, author Uyless Black proves himself a brave man by tackling the daunting subject of Internet telephony. This is the world of private branch exchanges (PBXs), local exchange carriers (LECs), plain old telephone service (POTS), and a slew of other acronyms that are enough to unnerve even the most tech-savvy among us.

However, Black's long-winded explanations often make it tough to digest the information he presents. For example, he approaches voice coders like so: "The principle function of a voice coder is to encode pulse code modulation or PCM user speech samples into a small number of bits in such a manner that the speech is robust in the presence of link errors, jittery networks, and bursty transmissions." And though there is an appendix that lists all the acronyms used in the text and what they stand for, this book would have benefited mightily from a full-blown glossary.

On the positive side, Voice Over IP is chock-full of terrific tables and charts that illustrate network topologies and the different elements of protocols involved in transmitting voice traffic over an IP network. In addition, an extremely useful chapter titled "Performance Considerations" provides the results of three voice over IP studies conducted in various networking environments as well as comparative product information on such market leaders as Cisco and Lucent. So if you're not put off by high-voltage technology and its murky vocabulary, this book is a good selection. However, it may be a little much for those who are unfamiliar or only vaguely acquainted with IP telephony. --Sarah L. Roberts-Witt

From the Back Cover:

The authoritative guide to Internet telephony

Managing and optimizing the performance of IP voice networks
Configuring IP-based call centers
Internetworking IP with SS7

Uyless Black has written the essential guide for telecommunications professionals who must understand voice-over-IP (VoIP)-or deploy it. Clearheaded and free of hype, Voice Over IP carefully evaluates both VoIP's challenges and its compelling advantages, and then reviews each technical standard and critical issue associated with successful deployment.

Start by reviewing the key Internet and IP characteristics that make VoIP difficult, including packet loss and variable delay. Next, understand the role of digital signal processors (DSPs) and voice coders in VoIP. Learn how to establish paths to service providers through the local loop via ISDN, xDSL, HFC, or other approaches; review modem technology for VoIP applications; and understand today's key Internet telephony protocols. Coverage includes:

Integrating total VoIP solutions: DSPs, voice coders, high-speed modems, gateways, local loop connectivity, and more
The role of VoIP gateways and gatekeepers
Internetworking SS7 with IP and H.323
VoIP supporting protocols for multicasting (IGMP and MBONE), bandwidth reservation (RSVP, RTP, RTCP), and security services

Black describes today's best approaches for managing performance in both private and public IP networks, compares VoIP with packet voice alternatives such as Voice over Frame Relay (VoFR) and Voice over ATM (VoATM), and more. You'll also find convenient references to telephony signaling, ISDN and SS7, and V.90 modems.

Every telecommunications professional will be impacted by the VoIP revolution. Whether you're evaluating or deploying VoIP, this book places a world-class telecom consultant at your side, delivering all the objective information and insight you need to succeed.

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