How to solve the problem of frequent ADSL network drop

ADSL Dial off line

There are three workstations in the office, the use of shared ADSL routing access to achieve simultaneous internet purposes, each workstation's internet speed is good.

A few days ago, a colleague in the office said recently do not know how, every time after the successful dial is not long, the network connection will be off the line failure, even if there is no drop line failure, ie browser to open the speed of the Web page is not as smooth as before, often a page opened to about half time, The browser will automatically eject the prompt to not find the server.

At first, also think that the Internet bandwidth during the peak of Internet access is only blocked, in order to avoid the peak of network access, after work and deliberately tried dial-up internet operation, however, it is surprising that the ADSL dial after the success of the network is still out of date, It is obvious that this kind of network drop failure is not related to peak surfing.

Possible causes of ADSL drop line

Considering the network virus or Trojan horse program often easily lead to network failure, so when the fault encountered, nature will be suspicious of the eyes turned to the virus program or Trojan program.

The virus causes ADSL to drop the line

In order to check whether there is a virus in the workstation, the author immediately hands-on to find the latest version of the anti-virus software, and the workstation of each "corner" of a thorough virus killing operation, after a long time after the antivirus wait, the author from the workstation system has really found some network virus.

Originally thought these network virus is causes the network to drop the "sin huai culprit", but when the author dials the success after again opens the Internet Explorer to attempt the net access content, the target website content is opened half when the ADSL modem again has dropped the line fault, appears ADSL Modem equipment work is not stable failure and network virus.

Network cable causes ADSL to drop the line

In order to verify that the network connection is normal, I first carefully check the cable connector is closely connected with the network card device, in order to ensure that they contact closely, the author of the network card device from the motherboard PCI slot out, and then use the rubber card on the surface of the gold finger oxide layer clear clean, Swap the NIC device into another free slot to ensure that the NIC device is in close contact with the PCI slot.

Then the network cable crystal Head re-inserted into the NIC interface, to ensure that the Internet connection between cable and network card is very reliable, after confirming that the network cable connection is all right, I tried again ADSL dial-up internet access, but the final result is still very disappointing to the author, ADSL Modem equipment After working for a period of time will often occur after the drop line failure.

Network card causes ADSL to drop the line

In the case can not find a way, I began to suspect that the NIC driver is a problem, it is likely that we in the process of frequent loading and unloading applications accidentally damaged the network card driver?

In order to exclude the network card driver factor, the author decided to uninstall the previously installed NIC driver from the computer, think of it, I immediately opened the system's Device Manager window, expand the network adapter options, then select the target network card from the pop-up branch, and execute the "uninstall" command in the right-click menu (as shown in the following figure )。

This allows the driver of the NIC device to be completely uninstalled from the system.

After, then follow the usual method to reinstall the network card device driver, and configure the network card device's Internet parameters, and finally try ADSL dial-up internet, the author found that can not solve the dial-up Internet failure. Is there a hardware problem with the NIC device?

Under the helpless, the author had to borrow a work of a normal network card device, and then the network card successfully installed in the failure of the computer, and reconfigure the Internet parameters, but after the Internet test I found that the dial-off failure is still not resolved. Various can think of failure factors are eliminated, the author still can not successfully solve the frequent disconnection of dial-up network fault, this really let the author a little helpless.

The voltage instability causes ADSL to drop the line frequently

Occasionally chatting with the Netizen said that the ADSL internet dropped the fault, to understand that most of the ADSL modem equipment work performance related. According to this analysis idea, the author also re-dial the Internet unstable failure to troubleshoot the focus of "locked" in the ADSL modem equipment.

After work, the author once again ADSL dial-up internet operation. When the dial-up operation succeeds, this time I did not immediately open IE browser to try to access the content of the webpage, but carefully observe the ADSL Modem Device Control Panel of the signal change status. Sure enough, a moment's time, ADSL modem equipment has occurred automatic restart phenomenon. After continuing to observe, I see the ADSL modem equipment is always trying to restart, each time interval of restarting the device has no regularity to follow, and the ADSL modem device every time you try to restart, the unit office of the lights as if there is a sudden darkening phenomenon, is not the local input supply voltage instability, which caused the ADSL modem equipment constantly restarted it?

Lenovo to the recent temperature rise, the first thing that colleagues work every day after working is to turn on the air conditioning, I estimate is probably the use of air conditioning, resulting in office power suddenly strained up, causing the ADSL modem equipment input supply voltage instability.

In order to guess whether their ideas are correct, the author immediately found a special measuring voltage multimeter, the ADSL modem equipment input voltage is carefully tested. Sure enough, I saw the equipment of the mains input voltage of only 200V, it is obvious that the voltage instability and input voltage too low caused the ADSL dial-up internet frequently dropped fault.

Find the cause of the failure, the author quickly suggested that the office to buy back the UPS power supply, when the ADSL device is changed from the UPS regulated power supply, the author found that after the successful dial, ADSL modem equipment has not been a long time to restart the phenomenon, Open Internet Explorer to try to access the content of the site page, the content of the Web page can be opened in a very short time, and ADSL modem equipment working state for a long period of time is normal.

At this point, ADSL dial-up internet frequently lost the fault of the line was successfully solved.

Fault Summary

ADSL Dial-up network caused frequent failure of the reason there are many, but most friends encounter this phenomenon, will first from the local computer system and network connection, to eliminate the frequent failure of the line, and few people will suspect that the input power problems, This is also a lot of friends in solving this kind of failure is easy to detour the reason!

In fact, as long as we do not often mobile computers, not often touch the network cable, not at random in the computer system loading and unloading software, then the ADSL dial-up Internet environment and network connection environment will rarely change, ADSL dial-up Internet may encounter the failure of most of the above factors unrelated.

At this point, we should pay attention to some of the dialing details, such as whether the ADSL modem equipment cooling performance is good, its power supply is normal, the dialing device around the presence of external interference, or whether the dial-up equipment to take a grounding, shielding measures, etc. These details will not only have a direct impact on the stability of dial-up Internet, but also in the exclusion is particularly easy to let people neglect!