To enable communication in bi-directions between a nurse call master machine and an ordering device, and to improve the reliability of data transfer and stability on operation while facilitating data management.
When there is a down-load request from a client program 120a for the ordering device 12, call history information stored in the nurse-call master machine or medical nurse information changed by the master machine is transferred to the client program 120a for the ordering device at a file unit without imparting an effect on the operation of a nurse call by a server program 100a for the nurse-call master machine 11. Then, when there is an up-load request from the nurse-call master machine, the call history information stored in the nurse-call master machine or the medical nurse information changed by the master machine can be transferred to the server program for the ordering device without imparting the effect on the operation of the nurse call by the client program 100b for the nurse-call master machine.
TAKAHARA KAZUHIKO
ANDO TORU
Hiromichi Watanabe
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