FAQs about ADSL bandwidth usage

Asyuncrical Digital Subscriber Loop Asymmetric Digital user line loop (ADSL) is a member of the XDSL family and is hailed as "express on modern information highway" by Western countries ". Because of its high downlink speed, high frequency bandwidth, and excellent performance, it is favored by many users and has become another new and faster and more efficient access method after modem and ISDN, it is also the most widely used access method in China.

ADSL usage exception

During the use of the broadband network, some difficult problems often occur, resulting in failure to access the Internet, affecting work, study and entertainment. The following describes some common problems in the use of ADSL Broadband and provides some reference solutions.

1. Problems with dial-up failure when using the USB-based ADSL modem.

Symptom and Cause Analysis: Generally, this problem occurs because the usb modem is powered by a USB interface and the startup time is short, the network device is not activated, or the line is not activated, that is, the ADSL modem is not activated, resulting in line failure.

Solution: if a similar problem occurs, we can wait for 30 seconds to several minutes and try again. Sometimes we can connect to the server as soon as it starts, in some cases, it may take several minutes to activate the service or restart the service. If the service cannot be activated for a long time, a problem may occur in the network connection. Contact the local telecommunications Bureau by phone, this situation is relatively rare.

2. I have been using a good ADSL modem and suddenly cannot access the Internet.

Symptom and Cause Analysis: there are many possible causes for such a problem. If hardware and line damage are excluded (the probability of such a problem is very small), there may be the following reasons: first, network equipment is overheated and unstable; second, automatic disconnection during IP address adjustment; third, the network system of the Telecommunications Bureau crashes, and the probability of such a situation is very small, however, I have met you twice.

Solution: if the network device is overheated and the operation is unstable, the device can automatically connect to the device in general. Due to the high heat of the ADSL modem, the hand is very hot when it is touched. To work stably with the equipment, it is still placed in a well ventilated place. Because the IP address of ADSL is dynamically allocated, sometimes the IP address needs to be adjusted, and a sudden disconnection may occur, after a few seconds, you can connect automatically. If you cannot connect, press reset Io to close the connection and start the connection. If the problem persists, contact your ISP and check whether the problem has occurred in the Network Center.

3. slow network speed

In general, the speed of 1 mb adsl bandwidth should be enough for our daily use (except for high-definition video-on-demand videos) or for a few people, but sometimes it is slow to open the web page.

Symptom and cause analysis: the first possibility is that some Web servers are busy. If other Web pages are not slow, the network should be normal. This is because some Web servers are busy. Second, it may be the compatibility between the dial-up software and the * Operating System. Again, there may also be line quality or distance problems, because ADSL uses a telephone line, if the distance is too long, there will be signal attenuation, leading to slow down the network speed.

Solution: We recommend that you try again several times later when some Web servers are busy. In terms of dialing software, if you use Windows XP * as the system, the system comes with a dialing tool without additional dialing software. If you use other systems, we recommend that you use the raspppoe dialing software. If the reason is the line quality or distance, please contact the relevant Telecommunications Bureau (for the district bureau where you install and debug ADSL, and leave contact information during installation.

ADSL Broadband sharing

1. Some friends use the ADSL modem of the Ethernet interface to access the Internet, and then build a LAN through the hub or vswitch, several machines, and then share the Internet solution.

The following uses the Real-Time ADSL2110-EH modem (with routing function) as an example to introduce the relevant settings. Generally, the default IP address of the modem is 192.168.10.1, which is used as the client (each machine connected to the hub or vswitch) after the NIC is connected to the hub or vswitch, you need to install the TCP/IP protocol and the IPX/SPX protocol of the LAN, and then set the IP address 192.168.10.x, which is the same as the domain in which the modem is located. The subnet mask is 255.255.255.0. The default gateway: 192.168.10.1 (the IP address of the modem), while the DNS server is set to the IP address of the local telecom network. You can select other projects by default.

If you are using a usb modem with 5800u and similar functions without routing, you can also share the internet. One of the machines connected to the ADSL modem acts as a host, and, like other machines, connects to the hub or switch through a network cable. On the host, set the IP address 192.168.0.1, subnet mask 255.255.0, Default Gateway: 192.168.0.1, and DNS server to the IP address of the local telecom network, and select share ADSL through the LAN, in addition, Windows XP firewall cannot be enabled on the host; otherwise, the Internet cannot be accessed. As a client, you only need to select to access the Internet through the lan. If it is a WINXP system, you can access the Internet without configuring it, the main drawback of this method is that the performance of servers is better, and once the server is shut down, other users cannot access the Internet.

2. Why is the network speed slow after multiple computers share the Internet?

The speed of Internet sharing mainly depends on the Internet access method and network bandwidth used. Currently, common ADSL speeds include 512 kbps, 1 MB, and 2 MB, cable Modem and residential broadband bandwidth are even 10 m, but the actual speed is usually dependent on the quality of service provided by the supplier, and sometimes cannot reach the nominal speed. Generally, a 1 mbps bandwidth network can be used by 1-12 people for browsing, chatting, and sending and receiving emails. All users share a 1 mbps bandwidth, however, the bandwidth is not evenly allocated to each computer. If one or more machines use a multi-threaded download tool to download files or play some online games with high bandwidth usage, therefore, it will occupy a lot of bandwidth, causing other computers to be too slow to access the Web page. If similar situations often occur, it is recommended that users in the network use a single thread to download or select a low-density time to download.

3. The two computers were originally connected by NICs. Later, they connected the network cards of one of the computers to the broadband. Which methods can be used to connect the other computer to the broadband?

There are three main methods to solve the problem of shared Internet access: using a hub or vswitch, you can directly connect the broadband network connection to the hub or vswitch, and then using the network cards of the two computers to connect to the hub or vswitch respectively, you can use the shared software to share the bandwidth. Second, you can install another network card on the machine that has connected to the bandwidth to connect the network card of another computer, share the Internet through network sharing software. Once again, if you have sufficient funds, you can select a Broadband Router to connect the network cable of the Netcom broadband to the WAN port of the router, connect the two computer NICs to the lanport of the router, and configure the pppoe dial-up function of the router to enable independent Internet access on any computer.

4. How can I ensure broadband Internet access security?

Many of my friends are worried that they will share broadband Internet access and their machines will be "Hacked". In fact, in general, the shared software is already powerful and generally has firewall functions, when the Internet is connected to a LAN, the LAN only has one valid IP address, and the Internet is connected to the shared server. Other computers in the system cannot access and therefore cannot be intruded. Therefore, compared with independent Internet access, Internet sharing greatly improves the security of computers, many broadband routers also have firewall functions, so the external connection is the vro itself. The vast majority of hackers cannot work after encountering a vro, so the security is higher, because the router itself is not afraid of attacks. Therefore, although you can rest assured that you will not be hacked!

5. There are two computers in the house sharing broadband Internet access, but it is troublesome to install the NIC. What is the simple method?

There are actually a lot of options. It is common to choose USB link to connect two computers online and then share the internet. However, you must note that there are two types of USB link connector: one is that only the simplest file transmission function is provided, and it needs to be implemented using special software, such cables cannot implement shared networks. Another USB connector is integrated with a dedicated control chip. After installation, it is virtualized as a network adapter in the hardware list, in terms of usage and configuration, it is basically the same as the NIC, which can achieve shared Internet access. However, compared with the network cable, the connection distance is relatively short and the price is more expensive. In addition, you can also use wireless Internet access. Although convenient, wireless devices are expensive.

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Dialing software problems
1 does the ADSL device need a dedicated driver?
A: No. install any software that complies with the pppoe Protocol. However, the NIC driver must be equipped with non-standard ADSL (except USB and built-in ADSL cards)

2. How to Use the ADSL dialing software?
A: ADSL uses pppoe (Point-to-Point Protocol over Ethernet, Point-to-Point Protocol on Ethernet) virtual dialing software, which has their own shortcomings. We recommend that you use the pppoe dial-up software that comes with Windows XP. After multiple tests, the virtual dial-up software is rarely interrupted, and the stability is also relatively improved. If you are using Windows 9x/Me, you can choose enternet, winpoet, and raspppoe. Enternet is a commonly used one. enternet300 is applicable to Windows 9x and enternet500 is applicable to Windows 2000/XP. If a problem occurs, try to use another virtual dialing software.

3. Why does ADSL appear to be connected to the Internet, but there is no data transmission pause every other time?
A: Generally, this is a problem with the ISP. Adjusting the ISP settings or modifying some of the settings may interrupt the ADSL information for a short time, but does not affect the connection status, only pauses data connected to the Internet.

4 Why is the startup speed slow after the pppoe software of ADSL is installed?
A: This is a problem with your Nic settings. Because a valid IP address is required when the system starts, the DHCP server must be correctly set in the LAN, if it is used by a single machine, you can specify an IP address that cannot be routed to the NIC, for example: 192.168.xxx.xxx, subnet mask: 255.255.255.0

5. Why is my pppoe software installation and operation normal, but I cannot list ISP service projects?
A: First, check whether the hardware connection is correct and whether the ISP is providing services. You can check the status of the ADSL modem synchronization work light. If the synchronization work light is normal, check whether other devices in the computer interfere with the work of ADSL and upgrade their drivers. We have encountered an earlier version of the driver of the Sound Card, which makes pppoe software unable to list service items correctly. Note that the ISP has activated your service. Because ADSL has some special numbers bound to the telephone switch, the ISP needs to authenticate these numbers to think that your line is valid and available, if the ISP's ADSL Access server is not enabled, you cannot list server projects.

6. Why is my pppoe software not properly installed?
A: In general, check whether the NIC Driver is correctly installed and whether other pppoe software is uninstalled before installation, whether other network software is installed in the system, such as shared Internet software. If it is recommended that you uninstall it, install pppoe before you install it. For winpoet (raspppoe) you also need to check whether * dial-up network components are correctly installed for the system.

7. How do I set up a proxy server to access the website when I want to access the Internet?
A: Because enternet works independently, the proxy server must be set to use the LAN proxy service. winpoet and raspppoe work with the dial-up network, so they are the same as general dialing settings, the proxy server needs to be set in the proxy server setting for the dial-up connection they have established.

8. Why cannot I use vicomsoft's Internet gateway to complete virtual dialing?
A: Internet gateway itself supports pppoe, so you cannot install any enternet300 or other pppoe software.

9 after the Windows2000 installation protocol is complete, no pppoe-related projects are found in the network properties.
A: Go to computer properties, hardware, and digital signatures, and disable the "Disable unsigned driver files" project.

10 raspppoe. EXE running prompt NO Nic selected
A: A. raspppoe only supports standard Ethernet protocols, pppoe protocols, and hardware devices. It does not support USB or built-in ADSL cards with built-in drivers.
B. In Windows 9x, check whether the connection and network card protocols are correct. If the problem persists, reinstall the relevant hardware software.
C. in Windows 2000, check whether the "State" of the "local connection" object connected to ADSL is in the disable state and enable it.
D. check whether all pppoe-related projects in Windows 2000 are selected.

11 My ADSL system is NT4.0 SP3 and winpoet virtual dial-up. After Reinstallation, many sites cannot be browsed. Some sites can be browsed today and cannot be browsed tomorrow, ping can also be pinged, or telnet to port 80, that is, we cannot use a browser. We use a WinGate proxy to access the Internet, and the client cannot access the Internet. What is the possible cause? Is it my setup or the Telecommunications Bureau? Has someone experienced a similar situation?
A: It is recommended that you take the following steps to make a simple judgment:
①. If you have multiple computers, you can replace them with other computers. Do not install any proxy server software on the replaced computer, and install only one Nic to connect directly with adslmodem. After you install the ADSL dialing software correctly. Check whether browsing is normal. If yes, the fault is caused by the user's computer. If not, check whether the modem and line are normal.
② A friend of only one computer can stop running all agent server software, such as Wingate/Sygate, and log on directly to see if the fault can be ruled out. If the agent server software is stopped, it must be a problem with the agent service software.
③ Check 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.
④ If you are using Windows, you can delete the TCP/IP protocol in the control panel/network, and then re-Add the TCP/IP protocol after restarting, many of my friends who could browse the webpage normally and suddenly could not browse the webpage were caused by an error in the TCP/IP protocol. After testing, most of them can be solved after reinstalling the TCP/IP protocol.
5. Change the browser software and test the browser.
⑥ Delete the original ADSL dialing software from the control panel/add and delete programs, and reinstall other ADSL dialing software. There are three kinds of ADSL dial-up software (winpoet, ethernet300, raspppoe) on the site home page download: http://www.cnitsc.com
7. If you have two NICs installed on the computer directly connected to the ADSL modem to access the Internet, try to pick up the NIC connected to the local area network and leave only the NIC connected to the ADSL modem. Check whether the fault is rectified. If the fault is rectified, check the network and system resource configuration. In particular, check whether the NIC conflicts with other devices (for Windows users, you can check whether the device is normal on the control panel, system, or device management)
After the above steps, if the fault still cannot be ruled out, or you can see that the power or sync lights of the ADSL Modem are not normal (in normal conditions, the power should be a long green light after the modem is turned on for two minutes, instead of a flash red light, sync should be a long green light instead flashing ), the following information should be prepared to 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. Is the call normal?
Whether the indicator lights are normal (green or red)
Contact and contact number
Detailed fault description

12 I have already entered my account and password. Why did I prompt that my password is incorrect?
A: When you enter a user name, you must specify the login and use service items because of the special nature of ADSL technology. Therefore, the user name format is generally in the following format: user Account @ Service Project Name (different ISP may be different from this), you can view the service project list provided by the ISP through pppoe software, select as needed.

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System settings and security issues

1 How To Make * The system stable?
A: Some operating systems may have compatibility problems with components related to ADSL. Taking Windows 98 as an example, there are major defects in its network components, which may lead to inexplicable disconnection during Internet access. In this case, the best solution is to patch the system. You can directly connect to the Microsoft Update site and select the patch downloaded from the system. After the patch is installed, install the virtual dialing software.

2. How to Prevent hacker and virus attacks?
A: If a virus destroys components related to ADSL, a similar situation may occur. The common manifestation is that ADSL is unstable, the speed changes greatly, and is easily dropped. Although the virtual dial-up method is a dynamic IP address in name, as mentioned above, it is in a fixed IP segment and the IP address remains unchanged throughout the process from going online to disconnected, this allows hackers to take advantage of it. We recommend that you install the "Skynet firewall" or "Kingsoft network firewall", which can monitor the communication between your computer and the network in real time and warn you of inexplicable network access methods, this effectively eliminates the risk of attacks. There must be a difference. First, whether the ISP provides a full 10 m ADSL access speed, and more pppoe protocol features, it will have 5-10% bandwidth for pppoe protocol signal transmission.

3. What is the DNS server address of an ADSL user?
A: ADSL users in Beijing can now set the DNS server:
Master DNS: 202.106.0.20
Secondary DNS: 202.106.196.115

4 compatibility between ADSL and Windows XP
A: I don't know what ADSL access device you are using. If it is built in, there may be compatibility problems with XP, while external devices generally do not have any problems. However, you must note that some ADSL virtual dialing software cannot run properly under XP and must be upgraded.

5. How can we improve network security?
A: the main reason for the successful implementation of network intrusion is that the user's system is not secure. Therefore, you must first set up your own computer securely and correctly, such as prohibiting file sharing and printing, disable NetBIOS loading on TCP/IP protocol, and install firewall software to greatly protect users.

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Questions about ADSL Modem Hardware
1 can I use a dial-up modem as an ADSL modem?
A: 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 10baset Ethernet interface instead of RS232 serial port or parallel port.

2 will ADSL be dropped like a 56 K modem?
A: When any connected device fails, ADSL will also be dropped. However, as long as the line quality is good, the chance of disconnection is still very small.

3. Does the signal affect ADSL modem?
A: ensure that the communication quality of the line is good and there is no interference with other devices that may cause line interference, such as telephone extensions and fax machines. Do not place the mobile phone number next to the ADSL modem, because the mobile phone will automatically find the network every few minutes, the strong electromagnetic interference is enough to cause the ADSL modem to be disconnected.

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, the latter does not need, but the setting method is similar.

5 can the ADSL device be used like a common modem?
A: No.

6 How does asdl modem connect to the Hub?
A: Switch the backend switch to the hub from the PC to connect to the hub through the same cable.

7 when are the ADSL bridging and routing modes used?
A: It depends on the service method of the Bureau. In general, the bridging method is used for home users, while the routing method is used for small offices or Internet cafes.

8. How can I determine the fault from the indicator light?
Answer: Power: When the ADSL Router is connected to the power supply, the power LED will be on. If the LED is off, check whether your power supply is correct.
Status: the handshake between the ADSL modem and the local device will flash and the connection will always be on.
Line when the Wan line is connected, the light will be on; when there is data transfer on the online road, it will flash.
The on-line LED indicator of the pc lan. When online Ethernet is enabled, the light is on; When Ethernet is not connected, the light is off. Flashes when data is transmitted over Ethernet.
Test is used.

9 What if the ADSL modem is abnormal?
A: If the operation is abnormal, try to reset the modem first. If not, contact the technical staff of the Telecommunications Bureau or contact us.

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Ethernet card Problems

1. Why is my ADSL data traffic too high?
A: We generally think that this is a poor quality or compatibility of NICs, especially for 10 m NICs of the old ISA bus. Because pppoe is a relatively new technology, such NICs may have compatibility problems and are slow, cause the final line of the conflict to be deadlocked or even crashed.

Is there a difference in the speed of using a 2 10 m/m Nic on ADSL?
A: In general, the speed will not be different, because the ADSL Internet access speed is not limited by the NIC and less than 10 m, but for the 10 m Nic, A large part of the ISA interface uses the I/O addressing mode, and its CPU usage is extremely low in efficiency, which will have a slight impact on the speed, therefore, we recommend that you use the PCI interface 10 M/M dual-speed adaptive Nic.

3 can I use 10 m/m network cards for ADSL?
A: Yes. ADSL external modem has a 10base-t interface and supports 10 m Nic. Currently, the vast majority of M NICs also support 10 m, so they can be used.

4 Why is pppoe unavailable on computers on the LAN when the ADSL connection uses 10 m/100hub?
Answer: The 10 BASE-T standard (10 m) is used for ADSL. It can connect to a 10/100 M hub, however, if the connection speed between your computer and the hub is 100 MB, The Hub's 10/100 switching module does not currently support pppoe well, therefore, pppoe may not be able to locate the ADSL signal at a speed of M, so it cannot be used. The solution is to create a 10 m network cable using a 10 m wiring method for the pppoe dial-up computer, or use the NIC setup program to forcibly set the speed of the network card to work at 10 m.

Is the speed of using a m/m Nic on ADSL different?
A: In general, the speed will not be different, because the ADSL Internet access speed is not limited by the NIC and less than 10 m, but for the 10 m Nic, A large part of the ISA interface uses the I/O addressing mode, and its CPU usage is extremely low in efficiency, which will have a slight impact on the speed, therefore, we recommend that you use the PCI interface 10 M/M dual-speed adaptive Nic.

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Separator Problems

1 isn't the ADSL separator the same as the telephone Splitter? What is a separator?
Answer: ADSL separates the low-frequency and high-frequency signals transmitted by ordinary telephone lines by means of the frequency division technology. Less than Hz is used by telephone; higher than Hz is used by the Internet, that is, data and voice signals are transmitted separately on the same copper line, and data signals are not transmitted through telephone switches. In this way, high-speed transmission can be provided: uplink (from the user to the network) Low-speed transmission can reach 640 Kbps, and downlink (from the network to the user) high-speed transmission can reach 7 mbps; in addition, accessing the Internet does not affect the normal use of the phone. The separator is used to separate the high-frequency and low-frequency signals in the ADSL telephone line.

2 If ADSL and telephone are the same as using a telephone line without a separator?
A: There are two cases. First, because ADSL works in full rate mode, the call's transient noise (such as dismounting) will interfere with the operation of ADSL. To prevent this, a small external separator must be installed. Second, ADSL works in G. Lite mode. In this mode, the maximum transmission rate is reduced, but the user separator equipment can be saved. If you want to know the mode in which your modem works, consult the Telecommunications Bureau that provides the service.

3 How many external separators are available?
A: One separator has only two interfaces, respectively connecting the telephone and the external line, to isolate the pulse noise of the phone, while the ADSL modem connects directly to the external line. The other is the voice data splitter, which has three interfaces: an external line, an ADSL modem, and a analog telephone.

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Connection Cable Problems

1. How can I identify the advantages and disadvantages of a network cable?
A: There are more fake twisted pair wires on the market, and fake wires are also marked as real wires. In addition to fake lines, there are many situations where three types of lines are used to pretend to be five-category lines and cat-5e lines. The following is a network cable identification method:

In the first three types of cables, there are two to four lines, and in the fifth category, there are four to eight lines.
2 The outer rubber of zhenxian is not easy to burn, while the outer rubber of the fake line is mostly flammable.
3 false line at a high temperature (more than 40 deg C) outside the rubber skin will become soft, really don't.
4. The copper cores inside the zhenxian line are relatively pure, soft, resilient, and not easily broken.
5. The direction of the network cable is clockwise rather than clockwise. Clockwise bypass may affect the speed and transmission distance.
6. The number of lines in the network cable varies with the number of circles. If the number of circles is the same, the transmission signals between the two lines will interfere with each other, shortening the transmission distance.
There is a layer of metal mesh and insulation material between the wire and the rubber of the shielded twisted pair wires. The crystal head is also wrapped in metal.
8 if you have the conditions, you can find a 100-meter twisted pair wire and use the "Network Monitor" in Windows to perform a field test. The category 5 lines can reach 100 Mbps, and the Category 3 lines only have 10 Mbps.

2. How do I select a telephone line?
A: Check whether the junction box and the crystal head have poor contact and are bundled with other wires. If possible, use a standard telephone line. If the connection is in line with ITU (International Telecommunication Union) the standard category 3, Category 5, or Category 5 twisted pair wires are better. The telephone lines are separated after they are entered. The first line is telephone and the first line is computer. If you must use a wire box, it is best to choose a good quality. The cable connecting the computer to the ADSL modem is a twisted pair Cable attached to the ADSL modem.

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PC Problems

1. Do users need to apply for a dedicated telephone line to install ADSL? What are the requirements for users' computers?
A: To install ADSL, you can modify the existing telephone line or apply for a second telephone line dedicated for Internet access. There is no difference in installation and use. If you use an existing phone line, the previous phone number remains the same. A general 586-level computer is enough, with no special requirements. You can use a simple method to determine whether your computer is suitable: You can use a common Modem to access the Internet, and other computers that are still able to access the Internet can use ADSL.


Questions and answers about other questions about ADSL:
1. Current ADSL Access Method
A: Virtual dialing, that is, using ADSL "cat" (virtual) dialing. the dialing time is similar to that of a common 56 K "cat", and the IP address is automatically allocated. leased line ADSL Access uses a static IP address.

2. Will ADSL decrease the quality of telephone calls and decrease the speed of Internet calls?
A: ADSL uses the frequency division multiplexing technology to separate voice and data. Although it is on the same telephone line, the voice and data run on different frequency bands, so they do not interfere with each other. Even if you use a phone call to access the Internet, the speed of the Internet access will not decrease, and the quality of the call will decline.

3 can I modify ADSL for ISDN?
A: Although the bearer media is a copper core line, the voltage and signal code of the ISDN telephone line are different and cannot be changed to ADSL. You must first convert ISDN to a common Linear phone before using ADSL for access.

4. How do I install an extension number or other devices on my ADSL line?
Answer: It is best to connect the ADSL filter splitter to the import of the telecommunication bus, and then expand the extension from the telephone port separated by the splitter. Of course, the extension can be connected theoretically, however, this is because other electronic devices (telephones) are incorporated between the bus inlet (that is, the Telecommunications Board) and the separator, which may interfere with the communication of ADSL, because ADSL has high requirements on the line quality, it may affect the normal operation of ADSL, so it is generally necessary to install the extension after the separator line.

5. My location is far away from the IDC of the Telecommunications Bureau (China Telecom Branch). Can I install ADSL?
A: currently, the distance between ADSL technology and the Telecommunications Bureau is less than 5 kilometers. Therefore, it depends on the situation. Because ADSL has high requirements on the line, therefore, in order to ensure the quality of communication, the website considers that the communication quality is better than 3KM.

6 will ADSL be dropped like a 56 K modem?
A: When any connected device fails, ADSL will also be dropped. However, as long as the line quality is good, the chance of disconnection is still very small.

7 ADSL does not mean to use the ADSL line. I have installed it. Why didn't I see the Telecommunications Bureau change the line?
A: In fact, the physical media used by ISDN lines, telephone lines, and ADSL lines are common telephone lines, but the signal standards are different. The communication board will not change the lines for you, you can only connect your telephone lines to different devices in the IDC of the Telecommunications Bureau, which is invisible to end users.

On the 8 th, Chinanet needs to dial 163. what is the number for ADSL virtual dialing?
A: A user who calls a phone number is not required in the ADSL virtual dialing mode. The fee is not related to the telephone service. The user only needs to enter the account number and password for authentication, obtain a dynamic IP address, that is, you can access the Internet.
Leased Line users: ADSL can access the Internet and make phone calls at the same time. Like a traditional phone number, you do not need to dial the phone number for Internet access. You only need to connect to the ADSL power supply and turn on the computer to access the Internet.

9 do I need to buy new parts for my computer?
A: Yes. Due to the high speed of ADSL, You need to plug in a network card (10 MB ethernet card with RJ45 connector) on your computer)

10 I want to install ADSL, but I am worried that the quality of the telephone service will decline. In addition, does a call result in a decrease in the Internet access rate?
Answer: The ADSL device has already taken this into consideration. The technology of frequency division multiplexing is used to separate telephone and data streams without interfering with each other. In the test of the actual line, there is no difference between the phone number that installs ADSL and the voice of a common phone: When transmitting data information, bring up the phone number, stop the phone number, and make a casual call, the transmission rate remains unchanged.

11 can I connect to the ADSL device on the extension?
A: currently, no. You can only connect to the ADSL terminal device on a linear phone. Because ADSL overlays high-frequency digital signals on the base-frequency voice of a common telephone line, the addition of any device in the connection from the telephone company to the ADSL filter will endanger normal data transmission, therefore, do not use phone or phone anti-theft devices before filters.

12 why is the access speed of ADSL faster than ordinary dial-up modem sometimes?
A: The access speed of ADSL is slow as follows: 1) If you visit a foreign site, the access will be affected by factors such as the outbound bandwidth and the configurations of the other site. 2) because ADSL technology has high requirements on the quality of telephone lines, and currently widely used ADSL is a radsl (rate adaptive ADSL ), if the telephone line from the telephone building to the user is disturbed by external factors for a certain period of time, radsl dynamically adjusts the user's access speed based on the quality of the line and the distance between transmission.

13 I am an ADSL user, but sometimes I cannot access the Internet normally. Why?
Answer: ADSL is a Transmission Technology Based on twisted pair wires. Twisted Pair wires Tangle two insulated copper wires with a certain law to effectively resist external electromagnetic interference. However, most of the telephone lines on the market are parallel lines. Many of the lines from the telephone company's junction box to the user's telephone are parallel lines, which is very unfavorable for ADSL transmission, too long non-twisted pair wires may cause unstable connection, DSL light flashing, and other phenomena, thus affecting Internet access. Because ADSL overlays high-frequency digital signals on the base-frequency voice of a common telephone line, the addition of any device in the connection from the telephone company to the ADSL filter will endanger normal data transmission, therefore, do not use phone or phone anti-theft devices before filters.

14 why is the speed of my webpage opening slow?
A: There are several possibilities. As mentioned above, it may be caused by a large number of trunk data streams; 2. It may be caused by the remote server or the outbound bandwidth being too small or crowded; 3. It may be related to machine configuration. Generally, the memory size, CPU speed, and hard disk speed may affect the speed of webpage opening.

15 can't I access the Internet?
A: First, check all network connections from the physical contact analysis of the network adapter to see if the connection is loose. Check whether the NIC Driver in the system is abnormal. If any, reinstall the driver. Check whether the IP settings are consistent with the IP addresses left by the installation and maintenance personnel. If not, correct the settings. If none of the above statements can be restored, go to the Telecom broadband network maintenance center.

16 uses an ADSL card, but when dialing, the dialing software reports a timeout error (Time out while trying ...)
A:

1. Check whether the internal ADSL card is correctly connected to the separator, whether the connector is loose, and whether the network cable is broken. Or are you heavy? What about the yicang target?

2. Next, you can open the "properties" item for dialing created on the dialing software (such as enternet300), and then select the "configuration" item, in the "adapter", check whether the "GB-link a1020i adsl pci nic" of the ADSL card is properly bound. If not, select it, if there is no ADSL card "GB-link a1020i adsl pci nic" shadow () in this column (). You can open "properties" of "Network Neighbor" and select "TCP/IP-> GB-link a1020i adsl pci nic ", in the case of change, Ding yi Yu yi Cheng jie.

3. If the problem persists, the ISP's server or telephone line (ADSL has high requirements on the line quality, and the user end cannot exceed 5 kilometers from the telephone Bureau) is faulty, contact the ISP service provider for solutions.

17 How does ADSL modem transmit high-bandwidth data signals and voice signals at the same time? What is the workflow?
A: During ADSL connection, three channels are generated on the telephone line, one 8 Mbps downstream channel, one kbps upstream and control signal, and one common telephone channel below 4 kHz bandwidth.
Specific workflow: the signal and low-frequency voice signal encoded by the ADSL Modem are transmitted to the splitter device of the Telecommunications Bureau through the telephone line. If the signal is a voice signal, it is transmitted to the telephone switch, if it is a digital signal, connect to the ADSL local device and connect to the Internet.

18 what is the difference between pppoa and pppoe?
A: pppoa directly encapsulates and adapts PPP to the ATM Application layer, while pppoe encapsulates PPP packets through the Ethernet protocol and then adapts them to the ATM. Generally, pppoa is used in the routing mode. The authentication process is generally completed by the modem, while pppoe is generally used in the bridging mode, and the user's PC sends a pppoe request.

19 What are the differences between pppoe software?
Answer: The enernet300 has an independent dialing function and does not rely on the system;
Winpoet requires * system dialing support;
Raspppoe is only a protocol driver. It relies on the system, which is the same as the old modem dialing method.

Adsl faq analysis (collation)

Format:
Error Message
Problem
Cause
Solution

1. error message: Error 602 the port is already open
Problem: the dial-up network cannot be connected because the device is installed or in use.
Cause: raspppoe is not fully or correctly installed
Solution: uninstall and reinstall any pppoe software.

2. Error 605 cannot set prot Information
The port cannot be set for the dial-up network due to a device installation error.
Raspppoe is not fully or correctly installed
Uninstall and reinstall any pppoe software.

3. Error 606 the port is not connected
The port cannot be set for the dial-up network due to a device installation error.
Raspppoe is not fully or correctly installed
Uninstall any pppoe software, reinstall it, and check the network cable and ADSL modem.

4. Error 608 the device does not exist
The specified device does not exist.
Rapppoe is not fully or correctly installed
Uninstall and reinstall any pppoe software.

5. Error 609 the device type does not exist
The device category of the dial-up network connection is uncertain.
Raspppoe is not fully or correctly installed
Uninstall and reinstall any pppoe software.

6. Error 617 the port or device is already Disconnecting
The type of the device connected to the dial-up network is disconnected, rapppoe is not fully or correctly installed, ISP Server is faulty, connection line is faulty, and ADSL modem is faulty.
Uninstall and reinstall any pppoe software. Call the ISP to check the network cable and ADSL modem.

7. Rror 611 the route is not aviailbale/612 the route not allocated
The dial-up network connection route is incorrect.
Raspppoe is not fully or correctly installed, and the ISP Server is faulty.
Uninstall any pppoe software, reinstall it, and call the ISP to ask

8. Error 619
Unable to establish a connection with the ISP Server
Adsl isp Server fault, ADSL Telephone Line Fault
Check whether the ADSL signal lamp can be correctly synchronized. Call the ISP to ask

9. Error 621 cannot open the phones Book File
Error 622 cannot open the phones Book File
Error 623 cannot open the phones book entry
Error 624 cannot write the Phone Book File
Error 625 invalid information found in the phone book
Windows NT or Windows 2 k server network Ras network component failure
Uninstall any pppoe software and reinstall the RAS network components and raspppoe.

10. Error 630
No response from ADSL Modem
ADSL telephone line faults and ADSL modemd faults
Check ADSL hardware devices

11. Error 633
The dial-up network cannot be connected due to a device installation error or in use
Raspppoe is not fully or correctly installed
Uninstall and reinstall any pppoe software.

12. Error 638
After a long time, you still cannot connect to the ISP or ADSL Access Server
ISP Server failure. A telephone number is incorrectly entered in the dial-up connection created by raspppoe.
Run the raspppoe.exe command that created the dial to check whether the ISP service can be listed to ensure that the ISP is normal. Clear the phone number in the used dial-up connection or keep only one 0

13. Error 645
No response from the NIC.
Nic fault or NIC Driver fault
Check the NIC or reinstall its driver

14. Error 650
The remote computer does not respond and the connection is disconnected.
Network Protocol faults caused by adsl isp Server faults, Nic faults, and abnormal Shutdown
Check whether the ADSL signal lights are correctly synchronized. Call the ISP to ask. Check the network adapter and delete all network components to reinstall the network.

15. Error 651
ADSL modem reports an error
Windows is in safe mode, or other errors
When this error occurs, repeat it to report the specific error code.

16. error691
The user name and password entered are incorrect. A connection cannot be established.
Incorrect username and password, ISP Server fault
Use the correct username and password, and use the correct ISP account format (name @ Service), or call the ISP to ask

17, error 718
When the user name is verified, the remote computer does not respond and the connection is disconnected.
Adsl isp Server fault
Call ISP to ask

18. Error 720
The dial-up network cannot coordinate the protocol settings of servers in the network.
Network protocol error caused by abnormal shutdown of the adsl isp Server
Call ISP to ask. Delete all network components and reinstall the network.

19. Error 738
The server cannot assign an IP address.
The adsl isp Server is faulty. Too many ADSL users cannot provide enough IP addresses.
Call ISP to ask

20. Error 734
PPP connection control protocol terminated
Network protocol error caused by abnormal shutdown of the adsl isp Server
Call ISP to ask. Delete all network components and reinstall the network.

21. Error 797
ADSL Modem connection device not found
Cause: the power supply of the ADSL modem is not enabled, and the connection between the nic and the adsl modem is faulty. After the software is installed, the corresponding protocol is not properly bound. An incorrect empty connection is established when a dial-up connection is created.
Solution: Check the power supply, connect to the money, check the network properties, and check whether the raspppoe-related protocols are correctly installed and correctly bound to the relevant protocols, and check whether the NIC displays "?" No. Or "!" Check the property of the dial-up connection to check whether the device is connected to an [ISDN] device. The device is an empty device. If the device is canceled, and select the correct pppoe device instead, or re-Innovate the dial-up connection.