Cisco Voice over IP (CVOICE), Third Edition

Kevin Wallace

Publisher Cisco Press
ISBN 978-1-58705-554-6
RRP £41.99
Reviewed by Jim McGhie CEng MBCS CITP
Score 9 out of 10

Cisco Voice over IP (CVOICE) CVOICE provides a comprehensive introduction to IP telephony for someone trying to develop a basic learning in the topic. It can also act as a guide to anyone endeavouring to plan, design and implement a Cisco voice over IP (VoIP) telephony network. It also provides some of the learning required for the Cisco Certified Voice Professional (CCVP) certificate.

The first chapter sets the scene via discussion of the Cisco unified communications architecture and a general introduction to IP telephony networks. VoIP design elements are dealt with in the next chapter through the examination of topics such as voice encoding, signalling systems and digital signal processing. The third chapter provides comprehensive and detailed information on analogue call routing using Cisco voice gateways. Chapter four is devoted to call signalling over digital voice ports and the implementation of QSIG trunk circuits on a Cisco gateway.

Chapter five examines in detail VoIP gateways and the advantages and disadvantages of the protocols deployed in Cisco Unified Communications networks. Dial plans characteristics, considered to be a central part of any telephony network, are dealt with in chapter six. Chapter seven covers the associated topic of the manipulation of numbering plans and call control routing using IOS gateways. H323 Gatekeepers and their configuration is the subject of chapter eight. The ninth and final chapter deals with the Cisco Unified Border Element and its use in the replacement of physical communication lines with an IP connection to an internet service provider.

Included within the book is a 90-minute CD containing six video labs of the more common tasks encountered in VoIP system set-ups including the configuration of analogue and digital ports, dial peering and SIP signalling. They help greatly in reinforcing the teaching in the book through practical demonstration.

Kevin Wallace has done a good job of explaining both the background to telephony networking and VoIP technology implementations in a Cisco domain. If the book has one failing, it is in its use of American terminology, particularly in the topics covered on the CD. However, setting this aside, I have no hesitation in awarding the book nine out of ten in terms of its coverage of the subject matter, explanations of VoIP technology and value for money.

Further information: Cisco Press

November 2008