STARTING METHOD FOR TELEPHONE EXCHANGE SYSTEM

PURPOSE:To make a transient current value at a starting time small, and to make a telephone exchange system small in size and light in weight by starting the transmitting and receiving operation of data in order by differenciating the time at every group of circuit parts after initializing all the circuit parts by a main control part simultaneously. CONSTITUTION:A main control part 1 and circuit parts 21-2n are connected by a data transmitting line 4 of a control line, and the main control part 1 and the circuit parts 21-2n and a power source part 3 are connected by a power source line 5. In this case, regarding a starting control at a power source applying time, the plural circuit parts 21-2n are grouped and controlled. That is, since the plural circuit parts are started at every group, a transient current is distributed at the starting time of each group, so the transient current is reduced. Thus, without damaging the reliability of a system, it is possible to realize to make the system small in size and light in weight.