The market opportunity for UCC vendors in the U.S. SMB segment is around $4.5B for 2016—and growing. According to SMB Group’s recently completed 2016 Small and Medium Business Communication, Collaboration and Mobility Study, although just 12% of small businesses (companies with less than 100 employees) and 28% of medium businesses (companies with 100 to 1,000 employees) currently use UCC soluti...