remote data transmission
英[riˈməut ˈdeitə trænzˈmiʃən]美[rɪˈmot ˈdetə trænsˈmɪʃən]
Remote data transmission (RDT) was a term used in the 1980s, primarily in Germany, for the transmission of data between computers over a medium using a communications protocol. At the time, the most widespread form was RDT over the telephone network.