| 摘要 |
PURPOSE:To judge the generation of the hit of a signal, by transmitting a multifrequency signal differently from the signals at the front and the rear sides, transmitting the number of columns of the signal whose number of columns are not arranged on the line with a selection signal, and collating the number of the selection signals being received already with received number of columns. CONSTITUTION:The titled system is constituted in such a way that an output register OS sends the multifrequency signal to the input register of the exchange of another station as a forward signal via an output trunk OGT, and meanwhile, receives the multifrequency signal from the input register as a backward signal. Based on the detection of the hit of the backward signal (b) due to the hit(displayed in (x) mark) of the backward signal (b) from a reception side against the forward signal (a) from a transmission side, the next forward signal (c) is sent, however, since the backward signal from the reception side appearing again is the same signal as backward signal (b), the generation of the hit of the backward signal (b) can be recognized on the transmission side. Based on the above recognition, it is possible to perform reaction such as an operation to send a reset signal (d) from the transmission side and repeat the operation from the beginning. |
