TIME DIVISION MULTIPLEX TRANSMISSION SYSTEM

PURPOSE:To prevent disadvantage that an output terminal of a terminal equipment remains ON by utilizing a reset pulse so as to restore all output terminals to OFF state when the reset pulse to restore any output terminal of the terminal equipment to the OFF state is generated. CONSTITUTION:When a prescribed time elapses after a final control pulse is received, a reset pulse is outputted from a counter C4. Since the reset pulse becomes a conduction control signal of transistors(TRs) Q2, Q4, Q6, Q8 via an OR circuit 3, reset coils R1-R4 are simultaneously energized and output terminals T1-T4 restore to the OFF state. Thus, a disadvantage of leaving the output terminals T1-T4 to the ON state even when a one-shot pulse output type terminal equipment is subject to polling at a shorter interval than the period of the one-shot pulse.