| 摘要 |
PURPOSE:To attain easy communication at absence by connecting automatically a call to a switchboard when no response comes even in a prescribed time after an opposite party is called to inform the own telephone number or the like to the switchboard side. CONSTITUTION:When a caller dials a calling number of an opposite station, a dial pulse enters an input circuit 4 of an automatic calling device 11 from an output trunk 2, the dial pulse number is counted according to the control of a microprocessor 7, the number is stored, a modulating frequency in matching with the number is transmitted from a generator 8 to a transmitter 9 and irradiated from an antenna 10 as a radio wave. Then, if no response signal is obtained during a prescribed time nor an incoming line (e) is used, a channel between the caller side and the incoming line (e) is set by a matrix 5 so that the caller informs the telephone number being the number to be communicated by the caller to the operator of the switchboard. |
