| 摘要 |
PROBLEM TO BE SOLVED: To display out security data by performing its radio reception only at a shop defined as the object of data transmission service. SOLUTION: At line reception equipment (transmission side equipment) 4, a shop ID for specifying the shop of service object is applied to security data to be transmitted by an ID applying part 16, and the relevant security data are transmitted to information display terminal equipment (reception side equipment) 5 by radio through a radio unit 13. At the information display terminal equipment 5, these security data are received by a radio unit 32, coincidence in the shop ID of relevant security data is judged by an ID check part 34 and only the security data having the coincident shop ID are displayed out on a display part 6. Thus, the security data are received and displayed out only at the information display terminal equipment 5 installed at the shop of service object. |
