Around the Twin Cities metropolitan area, old lines are beginning to blur between previously separate telecommunications technologies. Within the near future, cable television, high-speed Internet access, and telephone service could all be provided in one package through one hook-up in each home. Already, St. Paul and many suburbs are close to completing that convergence. But a dispute between the City of Minneapolis and cable company Paragon has that city and its residents on hold while the rest of the region moves ahead.