PURPOSE:To attain economical and suitable data multiple address operation by providing a transmission means sending information simultaneously to plural terminal equipments connected via a communication channel and a returning means returning a confirming signal, etc. CONSTITUTION:When the information is subjected to multiple address communication to plural data display terminal equipments 7 connected via the communication channel, at first transmission information is sent repetitively singly unidirectionally from a data multiple address transmitter 1 to each data reception network controller 5 and each terminal equipment 7. Then each controller 5 receives a signal and when the transmitter 1 receives a reception end signal returned from each controller 5, the transmitter stops the repetitive transmission of transmission information. That is, the transmitter 1 repeats the transmission of the transmission information till a reception end signal being a reception confirming signal is received from each controller 5. Thus, the same information is sent to lots of the terminal equipments 7 in a short time economically.
展开▼
