| 摘要 |
PURPOSE:To attain efficient data transmission, by erasing a transmission data from a remote station located far from another terminal station to a CPU with the operation of a changeover device of the station, when the terminal station transmits the data. CONSTITUTION:Let a data from a terminal station 4i be transmitted to the CPU 1 via a terminal station 3n, then the changeover device 7 at the inside of the terminal station 3n is selected to the position as shown in broken lines and the data from terminal stations 3N-1, 3N at the upper stream from this terminal station 3n are all erased here and only the data from the terminal station 3n is transmitted to the CPU 1. When the data from the terminal station 3n is finished, the changeover device 7 is selected to the position as shown in solid lines, thereby enabling to transmit the data from the terminal stations 3N-1, 3N at the upper stream to the CPU 1. |
