Almost a year ago, they released this tool and apparently it’s been updated to the February 2012 edition.
With the Lync Server 2010 Bandwidth Calculator, you can enter information about your users and the Lync Server features that you want to deploy, and the calculator will determine bandwidth requirements for the WAN that connects sites in your deployment.
Calculating the bandwidth requirements of Lync Server 2010 can be a complex task. This tool provides a framework for architects, consultants, and administrators to estimate the additional network traffic that a Lync Server deployment will generate.
The tool can be used both by experienced consultants with expert product knowledge and by customers who don’t have specific product knowledge but would like to understand the possible network impacts of a Lync Server deployment.
With only the number of users on a particular site, and keeping all other parameters at their default setting, you can estimate the order of magnitude impact of Lync Server on your network. The defaults assume that your users use all communications modalities and have a medium usage profile. For a more detailed view, you will need to refine your user personas to accurately reflect the behavior of your users and the modalities available to them.
After you enter customer user personas and usage models into the bandwidth calculator, the output will show a detailed breakdown of the capacity requirement per modality. You can then determine whether you need to provide additional network capacity before you deploy Lync Server 2010. At a glance you’ll be able to see, for each site, whether the estimated bandwidth required is higher than the bandwidth that you have allocated for real time media.
The calculator breaks this information down for central sites and for branch sites. For easy reference, the calculator also produces a table with video bandwidth removed so you can see how video affects your bandwidth requirements at each site.
It also comes with a nicely written User’s Guide so you’re not spinning in the wind. It’s 17 pages long and goes over among other things, the changes that occurred between version .6 (the original version posted back in April 2011) and version 1.1 (the current version that is linked to below)
What changed? Near as I can tell “Use G711 for PSTN Calls over WAN” has been adjusted in the calculator to reflect changes in the CU4 patch for Lync 2010. (Page 10) Outside of this, I have no idea what else.
- DOWNLOAD: Lync 2010 Bandwidth Calculator
http://www.microsoft.com/download/en/details.aspx?id=19011
Kurt Shintaku's Blog 