Diagnose audio issues within your Office Communications Server 2007 environment using the Office Communications Server 2007 Deployment Validation Tool.
Download it at source: http://www.microsoft.com/downloads/details.aspx?FamilyID=3596a10d-65cc-4cca-8470-3f23d5ea55b2&DisplayLang=en
Technorati : Deployment Validation Tool, OCS 2007
Del.icio.us : Deployment Validation Tool, OCS 2007
Ice Rocket : Deployment Validation Tool, OCS 2007