| 摘要 |
PURPOSE:To relieve the delay in data transmission by providing a buffer memory to a device at the receiving side in a CAD system or the like. CONSTITUTION:The device 2 at the receiving side is provided with a buffer memory 4, and when the number of memories in use of the device 2 at the receiving side exceeds a prescribed the number of memories N1, the device 2 at the receiving side transmits a signal to stop data transfer to a device 1 at the transmission side. When the number of memories in use is less than the specific number of memories N2, the device 2 at the receiving side transmits the signal for start of data transfer to the device 1 at the transmission side. Thus, it is possible to locate devices A and B at intervals of several to ten- odds km. |
