Abstract: A multiple dwelling house interphone system includes a communication management device that controls communication between the collective entrance machine and the mobile phone. The communication management device relays the communication to the mobile phone registered as a calling destination of the collective entrance machine to be linked to the dwelling room master device using a predetermined application based on a VOIP. When a predetermined registration operation to allow communication with the communication management device based on the VOIP is performed to link the mobile phone to the dwelling room master device, information list on mobile phones already registered relative to the dwelling room master device as a link target is transmitted from the communication management device having accepted the registration in addition to an application for a download, and the mobile phone that has downloaded the application displays the information list on a display section of the mobile phone.