| 摘要 |
PURPOSE:To omit a Demand Assign device for a previous arrangement line by allowing a master station to transmit an idle line code at each prescribed period so as to inform the idle line to a slave station and the slave station transmits a line occupying application code so as to declear the occupation. CONSTITUTION:When the master station transmits the idle line code by a signal 1, a slave station uses a signal 2 so as to transmit the line occupancy code to the master station, and when the master station approves this application, the master station uses the signal 1 so as to transmit the number of the slave station and after the number is transmitted for a prescribed period, this line is occupied by the slave station. Further, when the master station desires to correspond to a slave station, the master station uses the signal 1 so as to transmit the number of the slave station desired to be corresponded and when the slave station approves it, the slave station uses a signal 2 so as to transmit a signal informing the approval to the master station and the slave station occupies this line. |
