Selective calling receiver for computing devices

Details Selective calling receiver for computing devices Selective calling receiver for computing devices

H - Electricity

04

B

H04B 1/16 (2006.01) G06F 1/00 (2006.01) G06F 21/00 (2006.01) G08B 5/22 (2006.01)

Patent

CA 2141483

A selective calling receiver connectable to a computing device which is capable of reading or writing information particular to the receiver. An external signal transmission device is provided independently of the computing device and sends an optical signal (code) to the receiver. The receiver receives the optical signal with a light-sensitive section thereof and compares it with a code assigned to the receiver. Only if the two codes are identical with each other, the receiver allows the computing device to access it. Therefore, the information particular to the receiver cannot be written to or read out of the receiver without the external signal transmission device. This prevents a person, simply obtained program software meant for the receiver, from writing or reading the particular information in or out of the receiver, thereby securing the receiver from improper use.

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