| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable improvement of reliability of abnormality monitoring and increase in communication speed by using specified small power radio having two different frequency allocation bands for security and general data at the same time.SOLUTION: An alarm unit 10-1 comprises: a first communication unit 26 for transmitting and receiving signals by use of a predetermined first frequency allocation band aimed at a specified small power radio station for security; and a second communication unit 28 for transmitting and receiving signals by use of a predetermined second frequency allocation band aimed at a specified small power radio station for data different from the first frequency allocation band. If fire is detected, both first communication unit 26 and second communication unit 28 transmit fire linked signals. The first frequency allocation band is a 426 MHz band frequency allocation band, and the second frequency allocation band is a 920 MHz band frequency allocation band.</p> |
