DATA RETRANSMITTING SYSTEM

摘要

PURPOSE:To eliminate the abolishment of data transmission when an error of a response signal is detected by retransmitting identical data until a correct response signal is received when the transmission error of response data to a transmission data is detected. CONSTITUTION:An equipment 1 at the transmission side transmits a data to an equipment 4 through a line terminator 2, a line 5 and a line terminator 3. The equipment 4 checks a reception data and when the data is correct, a response signal is transmitted to the equipment 1 and when not correct, a retransmission request signal is transmitted as the response signal. The equipment 1 checks the response signal and the identical data added with a retransmission flag is kept transmitted until no error exists. When no error exists in the response signal, the equipment 1 discriminates the content of the response signal and transmits the identical data added with the retransmission flag in case of the retransmission request.