| 摘要 |
PROBLEM TO BE SOLVED: To enable a plurality of radio call buttons to share one intercom slave unit, without a registration operation from a user to the intercom slave unit, at a place where a plurality of users having radio call buttons gather.SOLUTION: By the provision of a radio call button with a wireless tag, which transmits the self-ID in response to information reading request, an ID of an adjacent radio call button is read out by a wireless tag reader installed in the vicinity of the intercom slave unit, so as to make the self-intercom slave unit and the cooperating radio call button belong to the intercom master unit.SELECTED DRAWING: Figure 1 |
