| 摘要 |
PROBLEM TO BE SOLVED: To provide an interphone device for multiple dwelling house capable of calling dwelling unit extension equipment without performing a calling operation at the time of calling the dwelling unit extension equipment from dwelling unit equipment. SOLUTION: In this interphone device having the dwelling unit equipments J respectively to be provided in plural dwelling units and at least one of lobby entrance equipment EP and manager room equipment SM, the dwelling unit equipment J is constituted so that a dwelling unit extension equipment JB2 can be extended and is provided with an extension equipment calling means M1 for generating calling signals for calling the dwelling unit extension equipment JB2 when a handset HS is lifted in a state without calling from the other equipment and a lifted state continues for prescribed time without performing other operations. |
