摘要 |
<p>PROBLEM TO BE SOLVED: To easily wirelessly interconnect terminals. SOLUTION: A set of communication units 3a-3c has a standardized shape. In the case of wirelessly interconnecting terminals 1a-1c, the communication units 3b and 3c are inserted to a slot 2a of the terminal 1a to register a communication address and a common key which is specific to the set stored in the communication units 3b and 3c to the terminal 1a. Similarly, the communication address and the common key specific to the set of the communication units 3a and 3c are registered to the terminal 1b, and the communication address and the common key specific to the set of the communication units 3a and 3b are registered to the terminal 1c. Then the communication unit 3a is inserted to the terminal 1a, the communication unit 3b is inserted to the terminal 1b, and the communication unit 3c is inserted to the terminal 1c respectively, the communication addresses of the destination communication unit and the sender communication unit are used for a destination address and a sender address, and the common key is used to encrypt and decode transmission data to send/receive the data among the terminals 1a-1c. Parts of the communication units 3a-3c, that are protruded from the terminals are colored in a color depending on the transmission rate, and the kind of the communication unit sets can be discriminated by looking at the color.</p> |