Max Concurrent Audio Conferences my Lync Server can handle

Hello Experts,
Can somebody help with this calculations:
I was asked by my manager to to find out the "Max concurrent audio conferences" that our Lync Front End server can handle. I have tried used Capacity calculator, but I sometimes get confused with it.
My information:
Conferencing codec is G.722 codec,
we have 10,000 users in Lync Front End server
Server runs: dual processor, hexa-core 2.3 ghz
Assuming 30 % concurrent conferences
Thanks Guys

Given the user model that 5% of users in a pool may be in a conference at any one time, a pool of 80,000 users could have about 4,000 users in conferences at one time. These conferences are expected
to be a mix of media (some IM-only, some IM with audio, some audio/video, for example) and number of participants. There is no hard limit for the actual number of conferences allowed, and actual usage determines the actual performance. Then you could have
500 users or less in conferences at one time.
You can refer to the link below to calculate.
http://technet.microsoft.com/en-us/library/gg615015.aspx
Lisa Zheng
TechNet Community Support

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Max Concurrent Audio Conferences my Lync Server can handle

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