| 摘要 |
An intercom system having one or a plurality of wireless devices (300), an intercom base unit (500), and an entrance extension unit (400) for transferring, to the intercom base unit (500), the information received by wireless communication from the wireless device (300), wherein the wireless device (300) has a motion sensor unit (330) for detecting motion, an identification information storage unit (310) for storing the identification information of the wireless device (300), and a motion detection information generation unit (340) for transmitting movement detection information including the identification information to the extension unit when the motion sensor unit (330) detects motion. |
