Evaluating and Calculating "Five-Nines"
Posted: 01/08/2003
Abstract:
Over the past few years, "five-nines" reliability/availability has become a major issue in evaluating whether to move to new technologies. In particular, this is a point that is often raised concerning the readiness of VoIP for immediate deployment.
This tutorial is designed to explain what "five-nines" really means and to provide the viewer with an understanding of how to evaluate and calculate whether a given network actually provides an appropriate level of reliability.
Steven Taylor
Steven Taylor, consultant and broadband packet evangelist, is President of Distributed Networking Associates and Publisher of Webtorials.Com.An independent consultant, planner, author, and teacher since 1984, Mr. Taylor is frequently quoted in the trade press and is one of the industry's most published authors on high bandwidth networking techniques.
He has served as a Contributing Editor for Data Communications magazine, publishes articles in both Business Communications Review and Network World, and is co-author of two twice-weekly newsletters - wide area networking and convergence - distributed by Network World Fusion. Augmenting his skill as a teacher and consultant, Mr. Taylor's background in actually planning, implementing, and running an extensive network for the University of North Carolina brings a unique, real-world perspective to his work.
He holds a B.S. degree in Physics from Guilford College (Greensboro, NC) and a Master's degree in Physics from Dartmouth College (Hanover, NH).
http://www.webtorials.com/main/eduweb/manfr99/tutorial/five-nines/index.htm