WESTBOROUGH – The Massachusetts Broadband Institute at the Massachusetts Technology Collaborative (MBI) recently completed construction and testing of MassBroadband 123, a 1,200-mile fiber-optic network bringing high-speed Internet access directly to 1,200 key facilities in more than 120 western and central Massachusetts communities. MassBroadband 123 is a critical component of the Commonwealth’s strategy to invest in innovation infrastructure in order to create growth and economic opportunity in every corner of the Commonwealth.