broadband connection error 645, 720, 721, 718, 734, is also a common problem in the use of computers, the following small series talk about broadband connection error 645, 720, 721, 718, 734 appeared the cause and solution. The broadband connection error 645 is caused by the damage of the dial-up software file (common in xp system). The processing flow is as follows: Step 1: When the condition is met (the user has dial-up software), it is recommended to reinstall the dial-up software: if the fault is resolved, the fault The reason is "user software problem"; if the fault persists, it is recommended that the user find a computer company to repair the computer system, the cause of the failure is "user software problem". Step 2: If the above processing is invalid or the user cannot do simple cooperation, please call customer service 10000 Telecom (10060 Netcom/10050 Railcom) to report the obstacle. Broadband connection error 720 phenomenon is common in XP system, generally the system is restarted, can be dialed multiple times, 90% can be solved, the process is as follows: Step 1: It is recommended to restart the system and then dial the Internet again: (1 If the fault is solved, the cause of the fault is not (2) If the fault persists, it is recommended that the user restore the system or find a computer company to re-install the system format, and then re-install the system to update the system itself. Step 2: If the above processing is invalid or the user cannot do simple cooperation, please call customer service 10000 Telecom (10060 Netcom/10050 Railcom) to report the obstacle. Broadband connection error 721 (remote computer does not respond) This phenomenon is mostly USB interface Modem fault code, can be processed according to the following steps: Step 1: Determine whether the MODEM signal light is synchronized, the signal light synchronization refers to step two, the signal light is not synchronized, refer to steps 3 and 4. ,Fives. Step 2: When the signal light is synchronized, the user protocol is selected incorrectly (OA or OE). If not, the phone can be sent to the customer service phone 10000 Telecom (10060 Netcom/10050 Railcom). Step 3: The signal light is not synchronized, and it is judged whether the telephone line behind the MODEM is available. If it can't be used, and other phone numbers can be used, you can advise the user to change the phone line. If all the phone numbers of the user's home bill are not available, if not, you can call the customer service phone 10000 Telecom (10060) Netcom /10050 Railcom) to report. Step 4: Check if the separator is reversed. Broadband connection error 718 phenomenon, very few user-side problems: Step 1: It is recommended to first restart the computer and then dial the test: (1) If the fault is resolved, the cause of the failure is not. (2) If the fault persists or cannot be easily coordinated, you can call the customer service phone 10000 Telecom (10060 Netcom/10050 Railcom) to make an obstacle report. String 5 Broadband connection error 734 (PPP link control protocol terminated) /Error 735 (The requested address was rejected by the server! Step 1: It is recommended to restart the computer. Step 2: Dialing software error, it is recommended to reinstall the dialing software, common in XP The system has its own dialing. Step 3: If the above processing is invalid or the user can't do simple operation, please call customer service 10000 Telecom (10060 Netcom/10050 Railcom) to report the obstacle. This article comes from [System Home] www. Xp85.com