http://blogs.technet.com/b/fmustafa/archive/2011/04/13/lync-2010-bandwidth-calculator.aspxA Microsoft Excel spreadsheet that calculates WAN bandwidth requirements for a Lync Server deployment based on administrator-specified user profiles and network information. With the Lync Server 2010 Bandwidth Calculator, you can enter informationen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)