Abstract: According to one embodiment, a communication device including: a CPU; a wireless communication module; a radio signal detection module; a power supply circuit. The wireless communication module includes; a receiving module configured to receive a radio signal containing identification information from another device; a storage module configured to pre-store at least one of the identification information; a verification module configured to verify the identification information of the received radio signal against the identification information stored in the storage module; and a notification module configured to notify the CPU when the identification information of the received radio signal corresponds with the identification information stored in the storage module. The radio signal detection module makes a notification to the power supply circuit if the radio signal detection module detects the radio signal.

Abstract: In an image reading apparatus used for a copying machine and a facsimile device, an image reading scanner is separated from a main device of the apparatus in order to increase the freedom of the scanning direction of the original and increase the operability of the scanner. The hand scanner is moved by a hand of an operator on the original and reads the image data line by line. The image data representing a dot pattern is transmitted to the main device as an on/off modulated optical signal through a modem. The main device receives the optical signal and demodulates the signal using a modem to reproduce the image data obtained by the hand scanner.