| 摘要 |
A communication system including a communication box connected to a public communication line and capable of data communication with a child unit through a digital cordless (DCL) wave and with a multi-function device through a wires LAN (WLAN) wave, and wherein each of the child unit and multi-function device has a light emitting portion and a light receiving portion for optical communication between the child unit and multi-function device. The communication box and multi-function device have respective WLAN communication control portions which are normally placed in a non-operating state, and when the communication box receives facsimile data from the public communication line, the communication box commands the child unit to require the multi-function device to start its WLAN communication control portion, starts its own WLAN communication control portion, and transmit the facsimile data to the multi-function device through the WLAN wave.
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