ENGLEWOOD, Colo.--(BUSINESS WIRE)--CSG International (NASDAQ: CSGS), a global provider of interactive transaction-driven solutions and services, today announced that Atlantic Broadband, the nation's 13th largest cable operator, has extended its contract with CSG to provide comprehensive billing and customer care solutions across the enterprise. Under the terms of the six-year extension, Atlantic Broadband will continue its use of CSG’s pre-integrated, end-to-end billing solution to reduce opera