| 摘要 |
PURPOSE:To revise automatically the operating mode without interrupting power supply by providing a means for detecting a dial-enable signal or an incoming signal transmitted from a digital exchange to apply initial setting. CONSTITUTION:When a dial-enable signal is returned via a digital subscriber line SL, a signal detection circuit DET detects the dial-enable signal received by a transmission/reception circuit TR2 and inputs a detection signal (d) to a terminal NMI of a processor PU. The processor PU receiving the signal (d) starts the initial setting processing and applies initial setting to a transmission/reception circuit TR1 based on operating mode (m) set in a buffer memory BM. Then when an incoming signal is transmitted via the subscriber line SL in case of the incoming to the terminal DTE, the circuit DET detects the incoming signal received by the circuit TR2 and inputs the signal (d) to the terminal NMI of the processor PU. The processor PU applies initial setting to the circuit TR1 or the like based on the preset operating mode information (m). |
