| 摘要 |
PURPOSE:To simplify operation to a slave station telephone set by storing a dial signal, when the dial signal from the slave station telephone set is received when this telephone set is calling, and sending out the dial signal to a switchboard after the call of this telephone set is ended. CONSTITUTION:When a slave station telephone set 32 executes a call and receives a response from a main device 2, the telephone set 32 sends out an on- signal of a line relay 21. In such a case, in case this telephone set 1 is calling, a busy detecting signal is applied to a control part 24 from a detector 28, and when the control part 24 decides that the relay 21 on-signal is normal, a hybrid circuit 22 is connected to a switchboard by controlling the relay 21. The telephone set 32 listens to the voice of the telephone set 1, and can confirm that it is calling. A dial signal is sent out by the telephone set 32, and thereafter, when it is set to a cleared state, the control part 24 stores a demodulated 25 dial signal in a register 29 in accordance with a signal from the detector 28. When a call of the telephone set 1 is ended, the control part 24 sends a call signal to the telephone set 32, and when the telephone set 32 answers, the dial signal is sent to the switchboard by intermitting the relay 21 by a signal stored in the register 29. |
