How to calculate WAN bandwidth?

Hi Team,
We have a customer who has the following:
2 sites
5000 users distributed on the 2 sites
How do we calculate the bandwidth of the link between the 2 sites is what we need to calculate?
Please advise.

That's not an easy question and will depend on the number of users in each site, how much cross traffic you expect, how much conferencing will be involved.  Your best bet is to spend some time modelling it with the Lync Bandwidth Calculator to get a
good guess. 
http://www.microsoft.com/en-us/download/details.aspx?id=19011
Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question please click "Mark As Answer".
SWC Unified Communications
This forum post is based upon my personal experience and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

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