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QoS Measurement and Evaluation of Telecommunications Quality of Service

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Most people know that quality of service (QoS) in telecommunications has grown in importance over the past decade. This is thanks to the new competitive environment which has followed as a direct result of privatization and de-regulation, forcing companies to increase the quality of their networks and services. Yet QoS means different things to different people. In some developing countries where it is a struggle for QoS managers to wrestle with outdated equipment, even making a network perform in the way it was designed is an improvement in QoS.

The Quality of Service Development Group (QSDG) is a field trial group of QoS professionals from over 130 carriers, service providers, research companies and vendors from around the world. While informal, we operate under the auspices of Study Group 2 of the ITU-T. We gather annually in different geographic regions to discuss QoS issues within our companies. QSDG Magazine (www.qsdg.com) which as well as being our group’s official magazine, is also the only periodical in the world about QoS, and is distributed in 201 countries and territories.

William C. ‘‘Chris’’ Hardy is unquestionably among the leading lights in the field of QoS. As chairman of the QSDG I appreciate the contributions Chris has made, both to the QSDG group as a whole, and through his QDSG Magazine column Telecom Tips and Quality Quandaries, on which much of this book is based. If you are coming to grips with QoS in your company, this is the place to start.
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