One, line problems
First of all, check the home line, see whether the house connector is connected, the line is not through any interference sources, such as air conditioning, refrigerators, TV, etc., try to maintain a certain distance from these power equipment. You can also replace the indoor line with a network cable that is more resistant to interference. Make sure the lines are connected correctly. Connect the telephone line to the junction box after entering the house, and then go to the voice separator to separate, one line goes to the telephone, one line goes to the MODEM (the separator is labeled). At the same time to ensure that the line communication quality is good without being interfered with, not connected to other equipment that will cause line interference. And check the junction box and crystal head there is no poor contact and whether it is strung together with other wires. If possible, it is better to use a standard telephone line, and the PC is connected to the twisted-pair cable that comes with the ADSL Modem. The wiring is one of the most important factors in the quality of Internet access. Distance from the user cable line within 100 meters of the radio transmission towers, welding machines, trams or high-voltage power transformers and other sources of signal interference, can make the user down the line to receive stray waves (copper-coated steel wire shielding is weak, strong ability to receive signals), the user line caused by strong interference. Interfered with the signal is often unshielded down the line part of the entry, because the relay cable has a shield, the interference and the impact is very small. If you use some lower wires with shielding in places with high interference, it will reduce the unstable speed or drop phenomenon caused by interference. In addition, the power line must not be parallel with the adsl line to prevent crosstalk and cause adsl failure. There are also many other factors that cause network instability, such as signal interference and software conflicts. Cell phones, which have a lot of radiation, must not be placed next to the ADSL Modem, because every few minutes the cell phone will automatically find the network, and then the powerful electromagnetic interference is enough to cause the ADSL Modem to cut off the flow.
The second problem is the network card
The network card is usually a PCI card or on-board network card, when you choose to choose a better quality, otherwise it may cause the quality of the Internet is not good. 10M or 10M/100M adaptive network card are available. In addition, many machines *** enjoy Internet access, the use of dual network card, which is also caused by the same conflict of concern, this time, should be pulled up to connect to the LAN or other computer network card, only connected to the ADSL network card Internet test, if the fault returns to normal, and then check the two network cards have no conflict.
Three, ADSL MODEM or network card settings
Now MODEM generally has two working modes, one is the normal mode using dial-up software, and the other is the automatic dialing routing mode. In normal mode, there is no need to set up the MODEM, just use the default. Routing mode, on the other hand, requires settings. The MODEM comes with its own flash memory, so you can deposit account and password box settings for power-on auto dialing. This method is most commonly used when the IP address of the ADSL Modem is set wrongly, or the DNS server is set wrongly. Because for ADSL virtual dialing users, there is no need to set the IP address, it can be assigned automatically, and the TCP/IP gateway usually doesn't need to be set. However, DNS settings must be set correctly, DNS address can be obtained from the local telecommunications department. In addition, the TCP/IP settings are most likely to cause the situation of not being able to browse the web, generally set to automatically obtain an IP address, but the DNS must be filled in.
Four, ADSL Modem Synchronization Abnormal Problems
Check to see if your phone line and the ADSL connection is not in good contact, or the phone line is faulty, the bad quality of the phone is particularly easy to cause the line drop, but such problems are not easy to check, so be sure to use a better quality phone line. If you suspect that the splitter is bad or the ADSL Modem is bad, try to connect the external line directly to the ADSL Modem without using the splitter. the connection line between the splitter and the ADSL Modem shouldn't be too long, or else it can't be synchronized. To rule out the above, just restart the ADSL Modem to solve the synchronization problem.
Fifth, the operating system, virus problems
In addition to the above mentioned line conditions, there are computer system problems. For example, the Legend Killer causes LAN dropouts. The problem is widespread throughout the country, and the virus affects both host agents and router agents in cybercafes (LANs). Legend Killer is a destructive software that performs ARP spoofing and virtual gateway address on LAN to collect login information of Legend game on LAN and analyze it in order to get user's information. Workflow: First, broadcast the MAC of the machine to the LAN through arp spoofing, so that the workstations in the LAN mistakenly think that the machine is a gateway. This process will cause the LAN and internet connection to be interrupted, causing the game to disconnect from the server. When the user restarts the game and logs in, the account information is not directly uploaded to the proxy server through the gateway, but to the Legend Killer software that is performing arp spoofing. Through the Legend Killer's own decryption means, will obtain the account's real user name and password. The purpose of stealing the player's account can be achieved by the decryption means of Legend Killer itself. Condition: LAN and internet link suddenly slow down or even disconnect. Network game disconnect link, and re-login prompted the server does not correspond. It is recommended that the first check for viruses; if you have the ability to do so, reinstall the system; such as the use of machines with dual-network cards, uninstall a network card; it is recommended that users who are not very familiar with the computer do not arbitrarily install a variety of firewall software, set up incorrectly will result in the Internet is not stable. Some operating systems may have compatibility problems with ADSL-related components, so you can go to Microsoft to upgrade the system, or repair the system. Reinstallation can be done if possible. If there is a software conflict, try to find out the conflict software, uninstall it or other methods to solve the problem.
Sixth, the firewall, IE browser settings are not correct
ADSL although hackers and viruses are less likely to be attacked, but we do not rule out the possibility of, in particular, web viruses and worms. If a virus destroys the relevant components of the ADSL, it can also cause a dropout. If you can determine the damage and attack by viruses, but also occurs when the flow phenomenon should check the installation of firewalls, *** enjoy the Internet proxy server software, Internet acceleration software, etc., stop running such software, and then test the Internet to see whether the speed is back to normal. If the Internet is not stable, you can try to turn off the firewall first, test the stability or not, in the corresponding settings. In addition, the firewall or IE browser failure can also lead to a normal connection, but can not open the page.
Seven, static electricity
Static electricity is an important factor affecting the ADSL, and the power supply at home are generally not grounded, coupled with a variety of electrical appliances (such as refrigerators, TVs) interference, it is easy to cause static interference, resulting in the use of ADSL in the use of frequent dropouts, please will be a three-core socket grounding end of the lead wire and a good grounding, you can generally solve the problem of dropouts. General solution: Increase the grounding wire to solve the problem.
Eight, the software conflict
ADSL access to the Internet in the form of virtual dial-up and leased line access to two kinds of individual users of ADSL is now mostly virtual dial-up. And PPPOE (Point-to-Point Protocol over Ethernet Ethernet point-to-point protocol) virtual dialing software have their own advantages and disadvantages. After a number of tests in different operating systems, if you use the operating system is Windows XP, it is recommended to use its own PPPOE dialing software, less outage phenomenon, stability is also relatively improved. If you are using Windows ME or 9x, you can use the following virtual dialing software - EnterNet, WinPoET, RasPPPoE. Among them, EnterNet is one of the more commonly used ones nowadays, EnterNet 300 is suitable for Windows 9x; EnterNet 500 is suitable for Windows 2000/XP. When you have problems with a PPPOE dialing software, you may want to uninstall it and use another PPPOE dialing software, please be sure not to install more than one PPPOE software at the same time, so as not to cause conflicts. Because the telephone line to the Internet is the main way of broadband access, and so it is necessary to set up a virtual channel, if several kinds of dialing software will cause conflicts, resulting in the network and its instability. If there is a software conflict, try to find out the conflict software, uninstall it or other methods to solve the problem. For example, some friends BT download will cause network dropout. This is because the downloads may take up too many threads and cause disconnections.
In addition, QQ and the game drop causes in addition to the above reasons for your own computer, but also with their own server limitations and the server was attacked or malfunction has a relationship.
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Troubleshooting
Generally, there are several reasons why an ADSL Modem may drop out: line quality problems, ADSL Modem heat dissipation problems, and excessive traffic.
First of all, check the line, and ADSL connected to the phone call is clear, no noise, wiring is also correct, there is no high-frequency power equipment around, ADSL Modem power on the process (including after dropping the line), the indicator light is also normal, so rule out the problem of line quality. Secondly, when ADSL Modem was found to be offline, its temperature was tested immediately, and it felt slightly hot and the temperature was normal. Because it is also connected to four computers, so unplug the connection with the other three computers, leaving only one Internet access, the problem remains, thus excluding the possibility of excessive traffic caused by this failure.
Is there a problem with the routing that comes with the ADSL Modem? I through the configuration program, the ADSL Modem will be set to dial-up, and then through the computer dial-up to access the Internet, everything is normal. Could it be that the routing of ADSL Modem is bad? At this time, I found that the software firewall is constantly alarming. It shows that there are multiple IPs constantly connecting to the machine's 135, 445, 2745, 6129 and other ports. I finally found the cause of the failure, it turned out that when the Internet through the routing method, the public network (Internet) IP address is bound together with the ADSL Modem, because there is no open NAT (Network Address Translation), the outside world of the connection request for this address is actually the role of the ADSL Modem on top of the ADSL Modem, the ADSL Modem in the data transmission, routing, has been running at full capacity. The ADSL Modem is already running at full capacity when it comes to data transmission and routing, and when it encounters a large number of connection requests, the computing power will be insufficient, resulting in dropped connections.
Solution
First, set your computer's IP address to the same network segment as the ADSL Modem's IP address. Then enter the ADSL Modem's Web management page. Click the "NAT" option in the "Services" section of the page, select "Enable" and click the "submit" button. Select "Enable" and click the "submit" button. Next, click the drop-down menu in the page, select "NAT Rule Entry", and then click the "Add" button on the page, a pop-up window for adding NAT rules will appear, in the "Rule In the "Rule Flavor" column, select "BIMAP". In the "Rule ID" column, fill in a larger number than the existing rule ID on the line (to ensure that this rule is the last rule, the original rules do not need to change), in the "Local Address" column, enter a random LAN address does not exist, and then the "Add" button will pop up the NAT rule window, in the "Rule Flavor" column, select "BIMAP". In the "Local Address" field, enter a random address that doesn't exist on your LAN and click the "submit" button.
Finally, go back to the home page of the Web management page, click "Admin→Commit & Reboot→Commit" to save the changes, and then click "Reboot" to let the ADSL Modem reboot.
After this setup, there was no more ADSL Modem disconnection, so the problem was solved. The above method is to transfer the connection request from ADSL Modem to a non-existing computer in the LAN, which can reduce the burden of ADSL Modem and will not affect the real computer on the Internet
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