Community antenna television communication system

摘要

A CATV system in which first and second terminal units are provided, connected in series via a transmission line, whereby the first transmission unit effects communiction with a control center while the second terminal unit controls channel selection for associated terminal units. In order to perform data communication, priority is determined between the first and second terminal units such that the second terminal unit is set in a stand-by state when the first terminal unit is in a busy state in which the first terminal unit communicates with the center, while the second terminal unit sends upward data to the first terminal unit in a state in which the first terminal unit requests upward data communication to the second terminal unit.