Using this board what do I need to look for in specs that will give me an estimate of concurrent calls?

Will this handle 100 phones?

http://www.amazon.com/gp/product/B0038GVR82/ref=oh_details_o02_s01_i01?ie=UTF8&psc=1

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Blakelund Priddy
Network & Systems Engineer
Bryant Public School District
Bryant, Arkansas 72022
http://www.bryantschools.org
p 501-653-5038
f 501-847-5656