JPS6485444A - Information transmitter - Google Patents

Abstract

PURPOSE:To surely receive information addressed to itself and to avoid the erroneous reception of information of other terminal equipment when a terminal equipment is faulty by allowing each terminal equipment to extract only a terminal selection signal assigned to itself to receive it and receiving an information signal under the condition. CONSTITUTION:A central unit 1 transmits information addressed to terminal equipments 21-2n through a common information line 5 and transmits a terminal selection signal assigned to each terminal equipment through other common line 6. The terminal equipments 21-2n extract only the terminal selection signal assigned to their own equipments respectively and receive the information signal under the condition of the reception of the terminal selection signal. Thus, each terminal equipment receives surely the information signal addressed to its own equipment by the reception of the terminal selection signal assigned to its own equipment. When a terminal equipment is faulty, since even the terminal selection signal assigned to its own equipment is not received, an event receiving the information signal of other terminal equipment in error is avoided.