1. When using the USB interface ADSL MODEM, the dialing cannot be turned on.
Phenomenon and cause analysis: In general, this happens because the USB MODEM is powered by the USB interface, the new start-up time is short, the network device is not activated or the line is not activated, that is, the ADSL MODEM is not activated. The line is not available.
Solution: There are similar problems, we can wait patiently for 30 seconds to a few minutes, try to connect, sometimes it can be connected, and sometimes a few minutes or restarts can be connected; if the line If you have been activated, you may have a problem with the network connection. Please contact the local Telecommunications Bureau in time, this situation is relatively small.
2. I have always used good ADSL MODEM, and suddenly I can't access the Internet.
Phenomenon and cause analysis: There is a problem, there are many probable reasons, if the hardware damage and line damage (small in this situation), there may be the following reason: First, network equipment overheat and work unstable The case; the second, the automatic disconnection of the IP adjustment process; third, the telecommunications bureau network system crashes, this situation is very small, but the author has two times.
Workaround: If it is unstable, the network device has an unstable work. Generally, the device immediately can be automatically connected; because the amount of ADSL MODEM is still large, the hand is very hot, and the equipment is stable. Also placed in a well-ventilated place. Since the ADSL's IP address is dynamically allocated, sometimes there is a sudden drop of the line, this is generally not needed, and it can be automatically connected after a few seconds, if you can't connect , Press the reset IO button to turn it off, then start, you can connect it. If you can't solve the problem, you can call your ISP and determine if it is a problem with the network center.
3. Network speed is slow
In general, 1MB ADSL broadband speed should be sufficient for our daily use (high-definition video on demand) or several people's use, but sometimes it is slow to open the web page.
Phenomenon and cause analysis: The first may be busy, if the other webpage is not slow, the network should have no problem, because the individual web server is relatively busy and the network speed is very slow. Second, it may be a compatibility problem between dialing software and operating systems. Again, it is possible that the line quality or distance problem, because ADSL uses a telephone line, and if the distance is too long, the signal attenuation will cause the network speed to slow.
Solution: The individual web server is busy, not what we can solve, I suggest you try again later. In terms of use of dial-up software, if you use the Windows XP operating system, your system comes with dialing tools, no additional dialing software, if you use other systems, it is recommended that you use the RaspppoE dial-up software. If it is a line quality or distance reason, please contact the relevant Telecommunications Bureau (for you to install, debug the ADSL area, and leave a contact information when installing).
ADSL broadband sharing problem
1. Some friends use the ADSL MODEM access to the Ethernet interface, and then build a local area network through the HUB or switch, and then share the Internet solution.
The following is described below to describe the relevant settings as an example of the THP ADSL2110-EH MODEM (Routing Function). Generally, the default IP: 192.168.10.1 of Modem is generally used as the client (machine per connected to the HUB or switch) machine guarantees that the network card is connected to the HUB or switch, you need to install the TCP / IP protocol and the LAN's IPX / SPX Agreement, then set the IP address 192.168.10.x, just like the domain where Modem is located, the subnet mask 255.255.255.0, the default gateway: 192.168.10.1 (IP address of Modem), and the DNS server is set to a local telecom network IP address. Other selection items can be default. If you are using a USB interface ADSL MODEM that does not route a routing function, you can also share the Internet. One of the machines connected to the ADSL MODEM is the host, as with other machines, connected to the HUB or switch through the 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, the DNS server is set to the IP address of the local telecommunications network, while selecting ADSL through the LAN, and on the host Can't open the firewall that comes with Win XP, otherwise you will not be able to access the Internet. As a client, you only need to choose to access the network through the LAN. If it is a WinXP system, you can basically don't set it. This method is mainly the shortcomings that the performance of the server is better, and once the server is shut down Other users cannot be online.
Does the 10M / 100M NIC are different from the speed of use on ADSL?
A: Generally, the speed will not have a difference, because the ADSL Internet speed is not limited by the NIC and below 10m, but for the 10M NIC, a large part of the ISA interface uses I / O addressing mode, its CPU The elimination rate is extremely high, which will generate a small impact on the speed, so this website is recommended to use the PCI interface 10M / 100M double-speed adaptive network card.
Isn't the ADSL separator and telephone division not a matter? What is the separator?
A: ADSL is the use of divided technology to separate the low frequency signals transmitted by ordinary telephone lines and high frequency signals. 3400HZ or less; 3400Hz or more high frequency part is used online, that is, transmitting data and speech signals on the same copper wire, and the data signal does not pass the telephone switch device. This allows both high-speed transmission: uplink (from user to network) to 640kbps, downlink (from network to users) high-speed transmission up to 7Mbps; and do not affect the normal use of the phone while the Internet. The effect of the separator is to separate high frequency signals and low frequency signals in the ADSL telephone line.
How to identify the advantages and disadvantages of the network cable?
A: Now there is more than the big twisted pair than the market, and the fake line is equally marked as the truth. In addition to the fake line, there are many three types of lines, super five lines on the market. Below is the authentication method of the network cable:
The lines in the three lines are two pairs of four, the lines in the five types are four pairs of eight.
2 The outer rubber of the truth is not easy to combust, and most of the outer skin of the fake line is flammable.
3 The fake line will be soft at a higher temperature (above 40 ° C), which is really not.
4 The copper core inside the real line is pure, and it is soft, tough and is not easy to be broken.
The 5 network cable torsion direction is to reverse the needle ratio instead of clockwise. Solve the speed and transmission distance clockwise.
6 The line in the network cable is different from the number of routes, because the transmission signal between the two pairs of transmission between the two pairs of wires interferes with each other, so that the transmission distance is shortened.
7 The wire of the shield twisted pair is between the rubber and the insulating material, and the outer surface of the crystal head is also wrapped in metal. 8 Conditions, you can find 100 meters of twisted pair using "Network Monitor" in Windows, and the 5 cable can reach 100Mbps, and the 3 cable is only 10Mbps.
