There are three ways for school broadband users with windows operating system to check whether the network cable port is normal, as follows: 1. Browser checking method: use the browser of the system to open any web page and observe whether it is redirected to the self-service page; If the self-service page opens normally, the port is normal; If you can't open any pages, the network cable port is not normal. After checking the network interface, if there are still problems, you need to report broadband failure; 2. Alternative dialing method: use the "broadband connection" that comes with the system (that is, ordinary broadband dialing at home), enter any account number and password, and check whether the error code returned after dialing is "69 1". If yes, the port is normal; If not, it means that there may be a problem with the link and it is necessary to report the broadband failure; 3. Replace the computer: Replace the computer that can dial to the faulty port. If you can still access the Internet, the port is normal; Otherwise, the port is abnormal, and the broadband fault should be reported. Guizhou users pay attention to China Telecom's customer service in Guizhou. The official account of WeChat can be paid by WeChat, and the phone bill can be recharged with one click. Traffic, points, bills and detailed bills can be operated by themselves, which is convenient and fast. Customer service 40 will answer your questions.