| 摘要 |
PURPOSE:To make a free time slot setting possible and to facilitate making changes of the number of lines accommodated in the line part by providing a line control circuit in the line part. CONSTITUTION:Each line part 1' accommodating plural lines has a line control circuit 7 consisting of a circuit 5 for recognizing a counter 4 and own time slot and a time slot generating circuit 6. These line parts 1' receive shared basic clocks respectively from the side of a multiplexing control circuit 2 and produces time slots by using pulses counted down by the counter 4 with using these clocks and the synchronous signals. When the circuit part 1' recognizes its own time slot by the own time slot recognition circuit 5, it sends the time slots to each line accommodated in the own time slot recognition circuit 5, so as to control the line to execute a serial operation of time division multiplexing for each line or a serial operation to every reverse line. |
