| 摘要 |
PROBLEM TO BE SOLVED: To provide an intercom system in which, when a visitor has an automatic door unlocked from a house information board and enters an apartment building, the dwelling unit number of the dwelling unit called from an apartment entrance unit is grasped in a management room. SOLUTION: The intercom system comprises: house information boards installed in respective dwelling units of the apartment building; a management room master unit installed in the management room; and the apartment entrance unit installed in an apartment entrance. In the intercom system, the management room master unit is provided with a house entry history storage means of storing a predetermined dwelling unit number when the apartment entrance unit specifies a predetermined dwelling unit number, and outputs a call signal, the house information board outputs an unlocking signal in response to the call signal. COPYRIGHT: (C)2011,JPO&INPIT
|
