PROBLEM TO BE SOLVED: To provide a nurse call system which allows a patient, who has moved the bed, to perform telephone conversation with a suitable speech volume, without requiring the work of a health care worker to reset the speech volume.SOLUTION: A controller has a patient information storage section storing a patient information table 60 associating a patient ID61 (patient identification information) capable of identifying a patient, a slave unit ID62 (bed information) used by the patient, and the speech volume 63 (volume setting information) of the slave unit when the patient uses the nurse call slave unit, and a volume information storage section storing a volume setting table 70 associating the slave unit ID62, and the speech volume 63 of the nurse call slave unit used in the bed. When the patient moves the bed and the slave unit ID62 of the patient information table 60 is updated, the speech volume of the nurse call slave unit in the bed at the movement destination of the patient in the volume setting table 70 is updated based on the updated patient information table 60.SELECTED DRAWING: Figure 4
