Three tricks to improve ADSL speed
The first trick: Know yourself and the enemy. If you want to solve the problem, you must first know yourself and the enemy. Let's first understand the working principle of ADSL. The biggest advantage of ADSL is that it does not need to set up a dedicated network. It can use the most widely distributed telephone copper wires in the world as the transmission medium, and can connect a pair of copper twisted pairs (telephone lines). ), three information channels are obtained: a channel for standard telephone services, a medium-speed uplink channel with a rate of 640kbps to 1Mbps, and a high-speed downlink channel with a rate of 1Mbps to 8Mbps, and these three channels can work at the same time.
In DMT modulation and demodulation technology, a pair of copper telephone lines uses the 0~4kHz frequency band to transmit telephone audio, and uses the 26kHz~1.1MHz frequency band to transmit data, and divides it into 25 with a width of 4KHz uplink sub-channels and 249 downlink sub-channels. The input data is converted into bit blocks after bit allocation and buffering, and then is sent to the sub-channel after TCM encoding and QAMM modulation. In theory, 15 bits of data can be transmitted per Hz, so the theoretical line speed of ADSL is 25×4×15=1.5Mbps. The theoretical downlink speed is 249×415=14.9Mbps (of course, this is only a theoretical peak value. In practice, it is difficult to achieve such high speed due to factors such as line quality and transmission distance).
The speed and stability of ADSL are mainly related to two points. First, the distance between your ADSL and the central office equipment (ADSL module room) of the telecommunications bureau. The further away, the slower and slower the speed. Unstable. The second is the quality of the telephone line itself and the amount of electromagnetic interference. Third, of course it’s because of our own equipment.
Following this idea, let’s try to solve the problem.
Second move: Transform the lines
The telephone lines that are widely used today were originally designed for voice communications. Their bandwidth is about 300Hz to 3300Hz, and data communications are not considered at all. needs. When surfing the Internet, there is a certain attenuation of the high-frequency part of the communication signal. Especially when the line is aging, the bandwidth is narrower and the attenuation is more severe - for ADSL, this is the most fatal. Since ADSL technology has high quality requirements for telephone lines, and the ADSL currently used is a type of RADSL (ie, rate-adaptive ADSL), if the telephone line between the module office and the user is interfered by external factors for a certain period of time, RADSL will Dynamically adjust user access speed.
ADSL is a technology based on twisted pair transmission. Twisted pair is two insulated copper wires intertwined with each other in a certain pattern, which can effectively resist external electromagnetic field interference. Users whose home parallel lines exceed 20 meters should first replace the parallel lines with twisted pairs, preferably branded Category 5 lines. When changing lines, be aware that the twisted pair is not strong enough, so you must try to fix it, otherwise you will bury a lot of hidden dangers. After replacing it, do you feel that the speed of surfing the Internet is much faster? Let me tell you a secret here. Telecommunications bureaus' junction box cables are originally twisted pairs, but in order to reduce costs, telecommunications bureaus usually change telephone lines to single-line connections. Of course, this had little impact when using the phone, but after connecting to ADSL, which is extremely sensitive to lines, it became a bottleneck! After discovering this problem, you must ask them to change the line to a twisted pair connection. After this bottleneck is eliminated, the speed of the Internet will be greatly improved.
After changing the outside line and entering the room, you should also pay attention to the following issues:
1. Because ADSL superimposes high-frequency digital signals on the low-frequency voice of ordinary telephone lines, so from the telecommunications The addition of any equipment in the connection from the office to the ADSL filter will affect the normal transmission of data, so do not connect telephones, phone anti-theft devices and other equipment before the filter. Although in theory, connecting a phone to an ADSL line will not have any impact on the Internet speed, when unqualified equipment is connected, the speed will slow down or even the Internet will not be able to be accessed. The author suggests that if possible, it is best to install an ADSL dedicated line, so as to avoid some inexplicable problems. money? Don’t worry, isn’t the initial installation fee cancelled? :)
2. Indoor wiring problems. Pay special attention not to run parallel lines with the power cord. When many unit buildings use internal wiring, they put telephone lines and power lines together and run them in parallel. Power lines have a very strong interference effect on telephone lines, and parallel wiring will greatly increase the interference. When we modify the lines, we must pull the lines separately! Pulling the cables individually can be labor-intensive and easily disrupt the overall layout of the room, but it does have a big impact on your internet speed. As for how to do it, you should carefully consider it yourself! Anyway, I took the route again.
3. The connection problem between the line and "Big Cat". There are many connection points between the lines and the "Big Cat" RJ-11 connectors. Due to the poor quality of some crystal connectors on the market and the poor quality of some "Big Cat" RJ-11 connectors, poor contacts often occur. situation.
The third step: Select the network card
After completing the above steps, we can connect the "Big Cat" to the computer.
In terms of interfaces, Big Cat mainly has two types: network card interface and USB interface, among which the network card interface is the most common. "Big Cat" is a new type of high-speed device, and many ISA interfaces (including some PCI interface network cards) do not work well. Therefore, when choosing a network card, you must pay attention to choosing a better network card. If possible, it is best to try several network cards. Do not be superstitious that the more expensive network card is the most suitable.
At the beginning, the author was very superstitious about high-priced network cards. I bought a 3Com 3C905B-TXNM network card worth more than 400 yuan based on the principle of the best price. I was really reassured by the quality of 3Com, and the results were good when used in a local area network. Very good too. But this is where my bad news about the Internet began! ! When I connected it to "Big Cat", I found that the Internet speed was only a pitiful few kbit! ! The debugging personnel were stunned on the spot. This was ADSL broadband, not dial-up! Is it because of the network card? Tested in local area, everything works fine! Is it too far from the telecommunications office's module office? It’s just over a kilometer here. Is it because of the "big cat"? It is also normal to test elsewhere. Is it because of the operating system? I just installed the system and can still access the Internet, so there should be no problem. After measuring the lines, switching modules, etc., the problem is still not solved! Calm down and think about it. Since the ADSL signal is good and the computer can access the Internet, it means that the line and computer should be normal. Experience shows that this may be a fault caused by poor compatibility. What to change? I found a network card with an 8139 chip and replaced it, and the fault was eliminated! I plugged in the 3Com network card and the fault occurred again. It was indeed it. When choosing and using a network card, the author has the following suggestions:
1. Be sure to choose a 10/100M adaptive network card. Don’t choose a 10M network card just for the sake of cheapness. The speed and compatibility of 10M network cards are universal. not good.
2. The "big cats" used by friends in most areas are donated by telecommunications bureaus, but some "big cats" have poor compatibility and stability. Therefore, it is recommended to change several network cards, and then change to different PCI slots. Sometimes different slots will have different Internet speeds. As for the specific reason, I have not verified it.
Some common problems in the use of ADSL broadband
ADSL (Asymmetrical Digital Subscriber Loop) is a member of the xDSL family and is used by developed countries in Europe and the United States. The country is known as the "express train on the modern information highway". It is deeply loved by the majority of users because of its high downlink speed, frequency bandwidth, and excellent performance. It has become another new, faster and more efficient access method after MODEM and ISDN. It is also the most commonly used access method in China. Way.
Abnormal faults in the use of ADSL
During the use of broadband networks, we often encounter some difficult problems, which lead to the inability to access the Internet normally and affect work, study and entertainment. The following provides some reference solutions to some common problems during the use of ADSL broadband.
1. When using the ADSL MODEM with USB interface, the dial-up cannot be connected.
Phenomena and cause analysis: Generally speaking, this situation occurs because the USB MODEM is powered through the USB interface, the startup time is relatively short, the network device is not activated or the line is not activated, that is, ADSL MODEM is not activated, causing the line to be unavailable.
Solution: If a similar problem occurs, we can wait patiently for 30 seconds to a few minutes before trying to connect. Sometimes it can be connected as soon as it is turned on, and sometimes it takes several minutes to activate or restart. It is possible to connect; if the line cannot be activated, there may be a problem with the network connection. Please call the local telecommunications bureau in time. This situation is relatively rare.
2. I have been using a good ADSL MODEM and suddenly cannot access the Internet.
Analysis of symptoms and causes: There are many possible reasons for such a problem. If hardware damage and line damage are excluded (the probability of this situation occurring is very small), the main reasons may be as follows: First, the network The equipment overheats and becomes unstable; secondly, automatic disconnection during the IP adjustment process; thirdly, the telecommunications bureau network system crashes. The probability of this happening is also very small, but the author has encountered it twice.
Solution: If the network equipment is overheated and the work is unstable, generally speaking, the equipment can automatically connect immediately; because the ADSL MODEM generates a relatively large amount of heat, it feels very hot to the touch. In order for the equipment to work stably, it is better to place it in a well-ventilated place. Since the IP address of ADSL is dynamically allocated, sometimes its IP needs to be adjusted and it will be suddenly disconnected. Generally, you don’t need to worry about this situation. It will automatically connect after a few seconds. If it cannot be connected, , press the RESET IO button to turn it off, then turn it on again, and you can connect. If none of the above solves the problem, you can call your ISP to determine whether there is a problem with the network center.
3. The problem of very slow Internet speed
Generally speaking, the speed of 1MB ADSL broadband is not suitable for our daily use (except for high-definition video on demand) or for the use of several people. It should be enough, but sometimes it is very slow to open web pages.
Analysis of phenomena and causes: The first possibility is that individual WEB servers are busy. If it is not slow to open other web pages, there should be no problem with the network. It is because individual WEB servers are busy that the network speed is very slow. . Secondly, it may be a compatibility issue between the dial-up software and the operating system. Thirdly, there may be a problem with the line quality or distance, because ADSL uses telephone lines, and if the distance is too long, signal attenuation will occur and the network speed will slow down.
Solution: We cannot solve the problem when individual WEB servers are busy. We recommend that you try again later. In terms of using dial-up software, if you use the Windows XP operating system, the system comes with a dial-up tool and does not require additional dial-up software. If you use other systems, it is recommended that you use RASPPPOE dial-up software. If it is due to line quality or distance, please contact the relevant telecommunications bureau (the district bureau that will come to install and debug ADSL for you, and leave your contact information during the installation).
ADSL broadband sharing issues
1. Some friends use ADSL MODEM with Ethernet interface to access the Internet, and then use a HUB or switch to set up a LAN with several machines, and then * **The solution for enjoying the Internet.
The following uses Shida ADSL2110-EH MODEM (with routing function) as an example to introduce the relevant settings. Generally, the default IP of MODEM is used: 192.168.10.1. As a client (each machine connected to the HUB or switch), after the machine ensures that the network card is connected to the HUB or switch, the TCP/IP protocol and the IPX/SPX of the LAN need to be installed. protocol, then you need to set the IP address 192.168.10. IP address. Other selected items can be left as default.
If you are using Shida 5800U or similar USB interface ADSL MODEM without routing function, you can actually enjoy the Internet. One of the machines connected to the ADSL MODEM is used as the host, and like other machines, it is connected to a HUB or switch through a network cable. On the host, set the IP address 192.168.0.1, subnet mask 255.255.255.0, default gateway: 192.168.0.1, and set the DNS server to the IP address of the local telecommunications network, and choose to share ADSL through the LAN, and You cannot open the firewall that comes with WIN XP on the host computer, otherwise you will not be able to access the Internet. As a client, you only need to choose to access the Internet through the LAN. If it is a WINXP system, you can access the Internet without setting it up basically. The main disadvantage of this method is that the performance of the server machine is better, and once the server is shut down , other users will not be able to access the Internet.
2. Why does the Internet speed slow down after multiple computers enjoy the Internet?
***The speed of Internet access mainly depends on the Internet access method used and the network bandwidth. Currently, the commonly used ADSL speeds are 512KBPS, 1MB, and 2MB. Cable MODEM and residential broadband bandwidths are even 10M, but The actual speed often depends on the provider's service quality, and sometimes it cannot reach the advertised speed. Generally speaking, a 1M bandwidth network can be used by 1-12 people for daily use such as Internet browsing, chatting, and sending and receiving emails. All users share the 1M bandwidth, but the bandwidth is not evenly distributed to each device. Computers, if one or several machines use multi-threaded download tools to download files at the same time or play some online games that consume a lot of bandwidth, a large amount of bandwidth will be occupied, causing other computers to have too slow network speeds and even being unable to browse the web. . If similar situations often occur, you can recommend that users on the network use single-thread downloads or choose to download at a time when the Internet density is not high.
3. The two computers were originally connected using a network card. Later, the network card of one of the computers was connected to the broadband. Are there any methods that can allow the other computer to connect to the broadband?
There are three main ways to solve the problem of enjoying the Internet: using a HUB or switch, directly connecting the broadband network cable to the HUB or switch, and then connecting to the HUB or switch through the network cards of two computers. , you can enjoy the broadband through the network sharing software; secondly, install another network card on the machine that is already connected to the broadband, connect the network card of another computer to it, and use the network sharing software to enjoy the broadband. Enjoy the Internet; again, if you have relatively sufficient funds, you can choose a broadband router, connect the Netcom broadband network cable to the WAN port of the router, then connect the network cards of the two computers to the LAN port of the router, and configure the router The PPPOE dial-up function allows any computer to access the Internet independently.
4. How to ensure the security of broadband Internet access?
Many friends are worried that their machines will be "hacked" if they enjoy broadband Internet access. In fact, generally speaking, the functions of the current Internet access software are relatively powerful, and they generally have The function of the firewall is that when the outside world connects to the LAN, since the LAN has only one legal IP address to the outside world, even if the outside world connects, it will only connect to the shared server. Other computers inside are inaccessible and cannot be invaded. Therefore, compared with each computer independently accessing the Internet, shared Internet access greatly improves the security of the computer. In addition, many broadband routers also have firewall functions. , then the external connection is the router itself. Most hacker attacks will no longer work after encountering the router. Therefore, the security is higher because the router itself is not afraid of attacks. Therefore, don’t worry, generally you will not be “hacked”!
5. There are two computers at home that enjoy broadband Internet access, but it is troublesome to install network cards. Is there any simple way?
There are actually many choices now. The more common one is to choose USB Link connection to connect two computers, and then enjoy the Internet. However, it should be noted that there are two types of USB Link cables: one type only provides the simplest file transfer function and requires special software to achieve it. This type of cable cannot realize full network sharing; the other type This kind of USB connection cable integrates a special control chip. After installation, it will be virtualized as a network adapter in the hardware list. It is basically the same as a network card in use and configuration. It can realize unlimited Internet access, but compared with the network cable, its connection distance is It's shorter and more expensive. In addition, you can also access the Internet wirelessly. Although it is convenient, wireless devices are also relatively expensive.
Dial-up software issues
1. Does ADSL equipment require a special driver?
Answer: No, just install any software that complies with the PPPoE protocol, but the network card driver still needs to install non-standard ADSL (except USB, built-in ADSL card)
2 How to choose adsl dial-up software?
Answer: ADSL uses PPPoE (Point-to-Point Protocol over Ethernet, Point-to-Point Protocol on Ethernet) virtual dial-up software, and these virtual dial-up software have their own shortcomings. It is recommended that you use the PPPoE dial-up software that comes with Windows XP. After multiple tests, it has been found that using the built-in virtual dial-up software has fewer interruptions and the stability is relatively improved. If you are using Windows 9x/Me, EnterNet, WinPoET and RasPPPoE are optional. Among them, EnterNet is a commonly used one now, EnterNet300 is suitable for Windows 9x; EnterNet500 is suitable for Windows 2000/XP. When problems occur, you can try to use other virtual dialing software.
3 Why does ADSL show that it is connected to the Internet, but there is no data transmission pause every once in a while?
Answer: Generally this is an ISP problem. ISP adjustment settings, or some imperfect settings will cause ADSL information to be interrupted for a short time, but it will not affect the connection status, only the data connected to the Internet. pause.
4 Why does the startup speed of PPPoE software for ADSL slow after installing it?
Answer: This has a problem with your network card settings. Since the system needs a legal IP when starting up, the DHCP server needs to be correctly set up in the LAN. If it is used on a stand-alone machine, just assign a non-routable IP to the network card. It can solve the problem, for example: 192.168.xxx.xxx, subnet mask: 255.255.255.0
5 Why is my PPPoE software installed and working normally, but cannot list the ISP's services?
Answer: First check whether the hardware connection is correct and whether the ISP is providing services. This can be judged by observing the display status of the ADSL MODEM synchronization work light. If the synchronization work light shows normal operation, then check the computer Whether other devices interfere with the work of ADSL and upgrade their drivers, we have encountered an old version of the sound card driver that caused the PPPoE software to fail to list services correctly. Another thing you need to pay attention to is whether the ISP has activated your service. Since ADSL has some special numbers bundled in the telephone switch, the ISP needs to authenticate these numbers before it considers your line to be legal and available. There is also no ISP ADSL access server. If it is on, then you cannot list server projects.
6 Why is my PPPoE software not installed properly?
Answer: Generally speaking, you need to check from the following aspects: whether the network card driver is installed correctly, whether other PPPoE software is uninstalled cleanly before installation, and whether other network software such as *** is installed in the system. If you have Internet access software, it is best to uninstall it and install it after PPPoE is installed. For WinPoET (RASPPPoE), you also need to check whether the dial-up network component of the operating system is installed correctly.
7 I want to use a proxy server when surfing the Internet. How to set up to access the site?
Answer: Since the Internet works completely independently, the proxy server needs to be set up to use the LAN proxy service. WinPoET and RASPPPoE work together with the dial-up network, so just like ordinary dial-up settings, the proxy server needs to be set up where they are established. Inside the proxy server settings of the dial-up connection.
8 Why can’t I complete virtual dial-up using Vicomsoft’s Internet GateWay?
Answer: Internet Gateway itself has PPPoE support, so you cannot install any PPPoE software such as Enternet300.
9 After the Windows 2000 installation protocol is completed, there are no PPPoE related items in the network properties
Answer: Enter the computer properties, hardware, and digital signature to close the "Prohibit unsigned driver files" item< /p>
10 RASPPPOE.EXE prompts that no network card is selected
Answer: A. RASPPPoE only supports the standard Ethernet protocol, PPPoE protocol and hardware devices. For USB or USB devices that come with their own drivers, The built-in ADSL card is not supported
B. Under Windows 9x, please check whether the connection and network card protocols are correct. If the problem persists, please reinstall the relevant hardware and software and try.
C. Under Windows 2000, check whether the "Status" of the "Local Area Connection" object connected to ADSL is in the Disable state and enable it.
D. Under Windows 2000, check the network properties. Check whether all PPPoE-related projects are selected.
11 My ADSL system is NT4.0 SP3, WinPoet virtual dial-up. After reinstalling it, many sites cannot be browsed, but some sites can be browsed today. , I won’t be able to browse tomorrow, I can ping it, I can ping it, I can telnet to port 80, but I can’t access it through a browser. We use Wingate proxy to access the Internet, and the client computer can’t access it either. What could be the reason? It’s mine. Is it a setting problem or a problem with the telecommunications bureau? Has anyone experienced a similar situation?
Answer: It is recommended that you follow the following steps to make a simple judgment:
①. Have multiple units? For computer friends, you can replace it with another computer. Do not install any proxy server software on the replacement computer, and only install a network card to connect directly to the ADSL MODEM. After the ADSL dial-up software is correctly installed. Check whether it can be browsed normally. If it can, the fault is caused by the user's computer. If not, you need to check whether the MODEM and line are normal.
② If you only have one computer, you can first stop running all proxy server software, such as WINGATE / SYGATE, etc., log in directly to see if the fault can be eliminated. If you stop running the proxy server software and then the fault is eliminated, That is definitely a problem with the proxy service software.
③Check the TCP/IP settings in the dial-up network properties, especially whether the DNS server settings are correct. The DNS server in Guangzhou is 202.96.128.68
④Friends who use WINDOWS can delete it TCP/IP protocol in the control panel/network, restart and then re-add the TCP/IP protocol. Many friends who were able to browse normally and suddenly were unable to browse the web were caused by an error in the TCP/IP protocol. After testing, reinstall TCP/IP. Most of them can be solved later
⑤Change a browser software to browse and test.
⑥Delete the original ADSL dial-up software in Control Panel/Add and Remove Programs, and reinstall other ADSL dial-up software. There are three ADSL dial-up software (WINPOET, Ethernet300, Raspppoe) downloads on the homepage of this site: itsc.com
⑦ If the computer you directly connect to the ADSL MODEM to access the Internet has two network cards installed, try Pick up the network card connected to the LAN first, leaving only the network card connected to the ADSL MODEM. Then see if the fault is rectified. If the fault is rectified, you should check the network and system resource configuration. Especially check if there is any conflict between the network card and other devices (WINDOWS users can check whether the device is normal in Control Panel/System/Device Management)
After the above steps, if the fault still cannot be eliminated, or you If you see that the POWER light or SYNC light of the ADSL MODEM is abnormal (under normal conditions, POWER should be a solid green light instead of flashing red after turning on the MODEM for two minutes, and SYNC should be a solid green light instead of flashing), then you should prepare the following Information, report the fault to the telecommunications department. You need to provide the following information to help them determine the fault:
Your ADSL account
Internet phone number, whether the call is normal
The brand of ADSL MODEM and whether the indicator light is normal (whether the light is green or red)
Contact person and contact number
Detailed fault description
12 I have already entered my account number and password, why is it prompted that my password is incorrect?
Answer: When entering the user name, due to the particularity of ADSL technology, it is necessary to specify the service items to log in and use, so the user name format generally uses the following format: user account@service item name (ISP may be different Differences from this), you can use PPPoE software to see the list of services provided by the ISP and choose according to your needs.
System settings and security issues
1 How to make the operating system stable?
Answer: Some operating systems may have compatibility issues with ADSL-related components. Taking Windows 98 as an example, its network components have major flaws, causing inexplicable disconnection problems when surfing the Internet. The best solution when encountering this situation is to patch the system. You can directly connect to the Microsoft Update site and select the patch searched by the system to download. After the patch installation is completed, install the virtual dial-up software.
2 How to prevent attacks by hackers and viruses?
Answer: A similar situation will occur if the virus destroys ADSL-related components. The usual symptoms are: ADSL is unstable, speed changes greatly, easy to drop, etc. Using virtual dial-up Internet access, although it is a dynamic IP in name, it is within a fixed IP segment as mentioned earlier, and the IP does not change from the time it goes online to the time it is disconnected. This gives hackers the opportunity to take. It is recommended to install the "Tianwang Firewall" or "Jinshan Netdart" network firewall. They can monitor the communication between your computer and the network in real time, and warn of inexplicable network access methods, effectively eliminating the risk of attacks. There are definitely differences. First, does the ISP provide full ADSL 10M access speed? In addition, it has PPPoE protocol characteristics. It will have 5-10% of the bandwidth used for PPPoE protocol signal transmission.
3 What is the DNS server address of ADSL users?
Answer: ADSL users in Beijing can now set the DNS server to:
Master DNS: 202.106.0.20
Auxiliary DNS: 202.106.196.115
4 Compatibility issues between ADSL and Windows XP
Answer: I don’t know what ADSL access device you use. If it is built-in The external type may have compatibility issues with XP, while the external type generally does not have any problems. However, please note that some ADSL virtual dial-up software does not run properly under XP and needs to be upgraded.
5 How can we improve the security of the network?
Answer: The main reason for the successful implementation of network intrusion is actually the insecurity of the user's own system settings. Therefore, the user first needs to set up his or her computer safely and correctly, for example: disabling file and print sharing, Prohibiting the loading of NETBIOS, etc. on the TCP/IP protocol, and installing firewall software can also greatly protect users.
ADSL MODEM hardware-related issues
1 Can the dial-up Modem I am using now be used as an ADSL Modem?
Answer: No, the ADSL Modem is different from the current dial-up Modem, the modulation method and network structure are different, and the interface to the PC is a 10BaseT Ethernet interface instead of an RS232 serial port or parallel mouth.
2 Will ADSL drop out like a normal 56K Modem?
Answer: When any connecting equipment fails, ADSL will also be dropped, but as long as the line quality is good, the chance of being dropped is still very small.
3 Does the signal affect ADSL MODEM?
Answer: Make sure that the line communication quality is good and not interfered with. There are no other devices connected that will cause line interference, such as telephone extensions, fax machines, etc. The mobile phone must not be placed next to the ADSL Modem, because every few The mobile phone will automatically search for the network in a few minutes. At this time, the strong electromagnetic wave interference is enough to cause the ADSL Modem to cut off.
4 ADSL Modem driver
Answer: ADSL Modem is also divided into two forms: USB interface and LAN (RJ-45 crystal head). The former needs to install the driver, while the latter does not. Required, but the setting methods are similar.
5 Can ADSL equipment be used like an ordinary Modem?
Answer: No.
6 How to connect ASDL Modem to HUB?
Answer: Turn the switch on the back from PC to Hub to connect the hub through the same cable.
7 When should ADSL bridging and routing be used?
Answer: It depends on the service method of the bureau. Generally speaking, the bridging method is used for home users, while the routing method is used in small offices or Internet cafes
8 How to determine the fault from the indicator light?
Answer: POWER: When the ADSL router is connected to power, the power LED indicator will light up. If the LED indicator light goes out, please check whether your power supply wiring is correct.
STATUS: It will flash when the ADSL Modem is shaking hands with the central office equipment, and it will stay on after connecting.
LINE When the WAN line is connected, the indicator light will light up; when there is data transmission on the line, it will flash.
PC LAN connection LED indicator. When the Ethernet is connected, this light will be on; when the Ethernet is not connected, the light will be off. Flashes when there is data transmission on the Ethernet.
TEST Used for testing, always off.
9 What should I do if the ADSL modem does not work properly?
Answer: If it is not working properly, try to reset the Modem first. If it still doesn’t work, please contact the technical staff of the telecommunications bureau or contact us.
Ethernet card problem
1 Why does my ADSL data flow die after a large amount of traffic?
Answer: We generally think that this is due to the poor quality or compatibility of the network card, especially the old ISA bus 10M network card. Since PPPoE is a relatively new technology, there may be problems with the compatibility of this type of network card. , and the speed is slow, causing conflicts and eventually line deadlocks or even crashes.
2 Is there any difference in the speed of using 10M/100M network card on ADSL?
Answer: Generally speaking, there will be no difference in speed, because the ADSL Internet speed is not limited by the network card and is lower than 10M. However, for the 10M network card, a large part of the ISA interface uses I/O In O addressing mode, the CPU occupancy rate is very high and the efficiency is very low, which will have a slight impact on the speed. Therefore, this website recommends the use of PCI interface 10M/100M dual-speed adaptive network card.
3 Can the 10M/100M network card used by ADSL be used?
Answer: Yes, ADSL external Modem has a 10Base-T interface and supports 10M network card. At present, most 100M network cards also support 10M, so they can be used.
4 Why ADSL connection uses 10M/100HUB, but PPPoE cannot be used on computers on the LAN?
Answer: It should be noted here: ADSL uses the 10Base-T standard, which is 10M. There will be no problem connecting it to a 10/100M HUB, but if the connection speed between your computer and the HUB is 100M ,, HUB's 10/100 switching module currently does not support PPPoE very well, so PPPoE may not be able to find the ADSL signal at 100M network speed and cannot be used. The solution is to use the 10M wiring method to make a 10M network cable on the computer used for PPPoE dial-up, or use the network card setting program to force the network card to work at 10M speed.
5 Is there any difference in the speed of using 10M/100M network card on ADSL?
Answer: Generally speaking, there will be no difference in speed, because the ADSL Internet speed is not limited by the network card and is lower than 10M. However, for the 10M network card, a large part of the ISA interface uses I/O O addressing mode, its CPU occupancy rate is extremely high and its efficiency is very low, which will have a slight impact on the speed. Therefore, this website recommends using the PCI interface 10M/100M?/td