The present invention provides a distributed interphone system capable of simplifying registration of settings of individual devices, for example, when new ones are installed. An interphone system includes apartment parent devices having setting files containing control contents for control of the apartment parent devices, registered therein, terminal devices, and building control units. A setting apparatus includes accessing units for accessing at least one registered setting file and at least one unregistered setting file of the devices, a display unit for displaying the control contents of the plurality of accessed device setting files, and a control unit configured to be able to copy the control contents of the registered setting file displayed on the display unit into the unregistered setting file.