| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily prevent interference with other wireless fire alarm system with a simple configuration. <P>SOLUTION: After completing frame synchronization, a control section 1 determines whether a received system code SysID of a wireless signal corresponds to a system cord SysID stored (registered) in a nonvolatile memory. If the two system codes do not correspond, the control section 1 immediately stops a wireless transmission section 2 to terminate a reception of the wireless signal and resumes counting an intermittent reception interval. With this operation, even though other system using the wireless signal with the same frequency exists nearby and the present invention received the wireless signal from the other system, the invention can prevent interference by determining that the received signal is from the other system based on the unmatched SysIDs and thereby preventing interference. Also, the invention can simplify a configuration by enabling a radio device TR1 which is a master station to use the same identification code as the system code SysID. <P>COPYRIGHT: (C)2012,JPO&INPIT |
