Community antenna television communication system

摘要

A CATV communication system in which a distribution unit performs the functions of channel tuning and response to polling for plural associated terminal units. The distribution unit includes a main central processing unit for performing data communication between the center and the distribution unit, at least one subsidiary central processing unit and a plurality of terminals associated therewith, and a switching unit for selectively connecting the buses of the respective processing units to buses of a ROM and RAM having sharable addresses with the condition that the main central processing unit has priority.