VOIP for Dummies Author:Timothy V Kelly This Avaya limited edition of VOIP for Dummies shows how converging your traditional voice and data networks can save money and increase efficiency and productivity throughout your organization - just what it takes to remain competitive in today's marketplace. IT Managers will appreciate the jargon free coverage of the innerworkings of VOIP and... more » end users will easily understand the benefits of VOIP features.« less