| 摘要 |
PURPOSE:To inform a response to an originator by connecting a general automatic telephone device to a network control device for data communication through a telephone circuit, and if a response is generated from a data terminal within a prescribed time after an automatic response based upon a call, switching the telephone circuit to the terminal side. CONSTITUTION:When a telephone circuit terminal 1 is terminated by an originator, a calling signal is detected by the automatic telephone response device 16, a DC circuit is closed, a voice response is outputted to the circuit and an L relay 4 is actuated to start a timing circuit 9. After a fixed time, the circuit 9 generates an output to a line 10, an H relay 12 is actuated and the telephone circuit is held independently of the state of the device 16 switching a current interrupting coil 6. When the timing circuit 9 sends a call display CI signal to a data terminal DTE20 and the terminal 20 sends a CML signal after receiving the CI signal, the CML relay is actuated and circuits L1, L2 are switched from the device 16 side to the terminal 20 side. If the CML signal is not detected within the time determined by the timing circuit 9, the H relay 12 is restored to restore the telephone circuit. |
