The communication control unit of the external communication apparatus requests a communication connection to the server. When a communication connection with the server is established, the communication control unit acquires the server side definition file from the server. The updating unit of the external communication apparatus updates the client side definition file with the server side definition file acquired by the communication control unit. The communication control unit of the external communication apparatus is configured to upload the medical apparatus side data to the server based on the client side definition file. Further, the communication control unit of the external communication apparatus is configured to reject a connection request from the server.