| 摘要 |
PURPOSE:To generate an alarm sound simply and economically without another sound source by extracting signals having plural kinds of frequency in an audible range included in a facsimile equipment itself and amplifying said signals to form alarm sounds. CONSTITUTION:A switch SW1 is connected between a network control device 2 and a MODEM4 and a control device 12 is turned on and off by the switch SW1. When a switch SW2 for selecting whether an alarm sound is to be generated or not is ON, a CPU5 connects the switch SW1 to the speaker side through a switch control device 12 and generates a signal having a specific frequency from the MODEM4. The signal has the frequency included in the audible area and is amplified by an amplifier 10 and generated as an alarm sound from the speaker 11. When the signal is sent for a fixed period, signal sending from the MODEM4 is stopped and the switch SW1 is returned to the network control device 2.
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