| 摘要 |
PURPOSE:To enable common use via the automatic exchanger for the slave stations having dialing function and not having the function. CONSTITUTION:When the call out signal fa from the dialing slave station is delivered by modulating electromagnetic waves, this is received at the master station 3 and the reception output is given to the signal converter 11. The converter 11 starts the automatic exchanger 2 via the bidirectional trunk 12A. On the other hand, the call out signal fb from the dialing disable station 1N is detected at the signal converter 11, then the control output represented in dotted lines is caused, operating the selector 13 and connecting the branched output of the bidirectional trunk 12A to the operator circuit of the attendant board 4 via the pair telephone set trunk 16. Accordingly, communication is made between the slave station 1N and the operator at the manual attendant board 4. Further, after the dialing slave station 1A is connected to the exchanger 2, communication can be made without the attendant board 4. |
