Expert answer:
Hello! Thanks for using our company's products! If the light of the TCP/IP communication port of the control board is always on, the communication line is basically connected. If it does not light up, please check the terminal of the network cable. Under the premise of normal network cable communication:
First, debug and check in the local area network to check whether the computer and the device are in the same network segment.
Second, debug and check across network segments, add a network segment:
upload/ueditor/uploadfiles/83751506323838.doc
Third, when using dynamic domain names for Internet access control, first obtain the actual IP of the domain name.