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Avaya is an American multinational technology company headquartered in Santa Clara, California that specializes in business communications, specifically unified communications (UC), contact center (CC), and services. Serving organizations at 220,000 customer locations worldwide, Avaya is the largest pure-play UC and CC company, ranking No. 1 in CC and No. 2 in UC and collaboration. The company had FY17 revenues of $3.3 billion, 78% of which was attributed to software and services.