| 摘要 |
PROBLEM TO BE SOLVED: To allow one person to perform quick work in the confirmation work of a communication state, to make work such as restoring a communication failure efficient and to reduce costs by allowing a client, e.g. in the neighborhood of a reading means to easily perform work such as confirming a communication state. SOLUTION: When a reading device 2 has received a request command from a relaying device 3, it produces response including sales information and used card information, etc., in response to it and sends it to the device 3. The device 3 confirms a communication state in a maintenance state by sequentially sending a confirmation command to the device 2 under control and receiving confirmation response from the device 2. A state confirming device 5 is configured as a portable confirmation terminal having portability, receives communication state information from the device 3 and shows it by sending a state confirmation request in response to a terminal confirmation command sent from the device 3 in a maintenance mode at a prescribed time interval. |
