The sale of a local cable system was agreed upon.

American Cablesystems Corp. of Beverly, Mass., announced the purchase from Heritage Communications Inc. for $15.5 million by American’s affiliate, American Cablesystems of California Inc. The system being acquired provides service to 12,000 subscribers in a 63,600-home area of Compton, South El Monte and Hawaiian Gardens and the unincorporated communities of Willowbrook, Athens, Firestone, Florence and East Compton.