Multiple dwelling house interphone system

A multiple dwelling house interphone system comprising:

• a collective entrance machine installed at an entrance of a multiple dwelling house used for calling and speaking with a dweller by a visitor;
• a dwelling room master device installed in each dwelling unit of the multiple dwelling house for responding to the call from the collective entrance machine;
• and
• a management master device installed in a manager room to speak with the dweller in each dwelling unit,
• wherein a sensor, comprising at least one of an environmental condition sensor and a dweller biometric life sensor, detects an occurrence of an abnormality in environmental conditions in one of the dwelling units or biometric conditions of the dweller in one of the dwelling units, and wherein the sensor is connected to each dwelling room master device,
• wherein when the sensor detects the occurrence of the abnormality in one of the dwelling units, an abnormality occurrence signal is transmitted from one of the dwelling room master devices to which the sensor that detected the abnormality in one of the dwelling units is connected to the management master device, and wherein one of the dwelling room master devices and the management master device emit emergency alarms,
• wherein the management master device includes
• a display section that displays various kinds of information and includes an operation section formed of a touch panel, and
• a display control section that displays an alarm stop button to stop an emission operation on the display section when the abnormality occurrence signal is received and the emission operation is started, and
• wherein when the alarm stop button is operated, the display control section subsequently displays an emission source call button to call tone of the dwelling room master devices from which the abnormality occurrence signal was transmitted.