To allow a medical staffer to confirm the medical staffer's own face while limiting the setting space of a nurse call master unit without affecting the medical staffer's confirmation of a call from a patient.

When a call is made in a nurse call cordless extension unit, an announcement image is displayed in a display part 6. When on-hook of a handset 7 is detected by a detection part 8, an image captured by a camera 5 is displayed in the display part 6 for a prescribed period of time only. Accordingly, a display device for displaying the announcement of the call from the patient and the display device for the display for confirming the medical staffer's own face can be common, so that the setting space can be limited. Further, as the image captured by the camera 5 is displayed in the display part 6 for the prescribed period of time only when the on-hook of the handset 7 is detected by the detection part 8, the medical staffer can confirm the medical staffer's own face without affecting the medical staffer's confirmation of the call from the patient.