株式会社日新テクニカホームページ:http://www.nissin-tech.com メール:info@nission-tech.com26 Operation mode Protocol Type:TCP > C/S Mode: Client Server IP Address:backend server IP address, such as 192.168.16.254 Port Number: backend server port number, such as 80807.1.3 Reference Setting figure7.2 Passive serial devices connected to the Internet7.2.1 Application scenariosPassive serial device networking refers to a way in which all equipment in the system has beenwaiting for connection in a passive state, only the background server initiate to connect withequipment, and request or download data. Some typical applications, such as sensor networks,entrance guard controller and so on, each sensor terminal or entrance guard controller is collectingdata all the time in real time. The data collected did not upload at once, but temporarily stored in the