All about Unified Communications, by Rui Silva.
Abouth the author:Rui Silva is a Solutions Specialist (Voice - Unified Communications) at Microsoft. He is MCITP/MCDBA/MCSA/MCSE:Messaging+Security certified and has been recognized as a Microsoft MVP for Exchange Server from 2005 to 2008, due to his contribution to several technical forums. Rui spends some of his (little) free time updating the Exchange dedicated blogs http://msmvps.com/blogs/ehlo/ (in English) and http://ehlo.blogspot.com/ (in Portuguese). But because he has a passion for writing, he authors some technical articles, published mainly at the MSExchange.org site.
Rui specializes with all kind of Microsoft technologies, with particular emphasis on Microsoft Exchange, Office Communications Server 2007 and Lync. Before joining Microsoft, Rui worked for some major Portuguese Gold Partners, such as ParaRede and Unisys.