| 摘要 |
PROBLEM TO BE SOLVED: To provide an intercom system capable of monitoring a broader range as a monitoring target.SOLUTION: An intercom system 100 has one or plural radio devices 300, an intercom master unit 500, and a gate slave unit 400 for transferring information received from a radio device 300 through radio communication to the intercom master unit 500. The radio device 300 has a motion sensor unit 330 for detecting a motion, an identification information storage unit 310 for storing identification information of the radio device 300, and a motion detection information generator 340 for transmitting motion detection information containing identification information to the slave unit when the motion sensor unit 330 detects the motion.SELECTED DRAWING: Figure 2 |
