ADSL is an affordable broadband access solution. Currently, it is billed in monthly subscription mode. If a user uses an account to access the Internet, it will be a bit uneconomical. How can one ADSL user access the Internet? The following are some experiences. Sharing principle In view of the current mainstream Ethernet interfaces, the external ADSL Modem has built-in routers and routing functions, and also has a large-capacity ROM chip (includi
From: http://topic.csdn.net/t/20030528/15/1845691.html
Using GPRS modem to access the Internet, the current implementation method is to use PPP as a transit, the GPRS transmission layer is like this:--------IP/X.25--------Sndcp--------LLC----------------RLC----------------Mac----------------RF----------------Ms is on the left and BS is on the right. For Ms, IP support can be provided, either in me, Ta, or te, as long as there is an interface. However
Before talking about this, we will first introduce another concept, DCE (Data Communication Equipment) speed. It refers to the transmission speed between two modem devices, that is, between telephone lines. We call 56k the speed. DTE (data terminal equipment) refers to the transmission speed from the local computer to the modem. If the telephone line transmission rate (DCE speed) is 56000bps, after receivin
the analog signal received by the modem to a digital signal, which is the modulation and demodulation of the signal.The device that implements the modulation and reconciliation task is called a modem ). When band transmission is adopted, both parties connect to a modem to transmit digital signals on analog signals (carriers. Therefore, this transmission method i
ADSL Broadband Access networks are still commonly used. So I have studied the troubleshooting methods for common faults in ADSL Broadband Access networks. I would like to share with you here, hoping to help you. With the rapid development of the Internet, the ADSL Broadband Access Network is rapidly developing. The advantage of low price has become the first choice for network access for individual users. As you know, when the ADSL Modem receives the
. Sometimes I cannot access the Internet, but the speed will be slow after I go online.The network is busy. Try again later. The telephone line quality may be poor.10. Will the machine automatically start after power-on?A: In the BIOS power management settings, set "Restore ac power loss" to "DISABLED.11. What should I do if the user does not want to hear the MODEM sound?Instruct the user to disable the MODEM
Now almost all of us are using ADSL to connect to the Internet. Many people who use ADSL internet access can not open the page, download interrupted, or online video, audio streaming interrupted. However, when carefully check the status of ADSL modem, you will find that dial-up login has been successful, the line is also no problem? Let's analyze the reason for ADSL off line.
Line problem
First make sure the wiring is connected correctly. Telephone
network failure, so when the fault encountered, nature will be suspicious of the eyes turned to the virus program or Trojan program.
The virus causes ADSL to drop the line
In order to check whether there is a virus in the workstation, the author immediately hands-on to find the latest version of the anti-virus software, and the workstation of each "corner" of a thorough virus killing operation, after a long time after the antivirus wait, the author from the workstation system has really found
partitions, but only one is active (or activated, or active ). Linux has approximately 6 GB of free space for future installation of certain software (such as Oracle, Informix, and kylix. Windows XP is installed first. After installation is complete, place the first installation disk in Linux, start from the disc, and press enter all the way to partition. It should be noted that, as long as you are bold and careful, Windows will not be affected. In Linux, the hard disk is identified in this way
hard disk partitions, we know that the total number of primary partitions (including extended partitions) cannot exceed four, nor can we enclose extended Partitions between primary partitions. According to this principle, it is easier to divide hard disk partitions and reduce unnecessary troubles in the future;
1. Use fdisk-L to view the number of hard disks mounted to the machine and the partition information;
[Root @ localhost beinan] # fdisk-l
Disk/dev/h
the isofs usage will increase to 1 time. If you try to remove the module at this time, it will not succeed because it is being used:# Modprobe-r isofsFatal: module isofs is in use.
Lsmod only lists the modules currently loaded. modprobe lists all available modules. It actually outputs all modules under the/lib/modules/kernelversion directory, and the list will be very long!In fact, it is not common to use modprobe to manually load a module. However, you can use the modprobe command line to set
In the use of ADSL sharing dial-up networking environment, there are often inexplicably download interrupt phenomenon, the Web page can not open the phenomenon or the phenomenon of online multimedia streaming suddenly interrupted, and so on, these phenomena are believed that most users who use broadband dial-up often encounter.
However, when these phenomena occur to the ADSL modem for careful examination, we will see the dial-up login is in a success
In the use of ADSL sharing dial-up networking environment, there are often inexplicably download interrupt phenomenon, the Web page can not open the phenomenon or the phenomenon of online multimedia streaming suddenly interrupted, and so on, these phenomena are believed that most users who use broadband dial-up often encounter.
However, when these phenomena occur to the ADSL modem for careful examination, we will see the dial-up login is in a success
China's broadband routers are developing very fast and their technology is also very mature. Many people may not know the application of broadband routers in the access technology. It doesn't matter. After reading this article, you will certainly have a lot of GAINS, I hope this article will teach you more things.
At present, ADSL permeate every corner of our lives, whether it is enterprises, Internet cafes, or home users using ADSL to access the Internet, usually, an ADSL line can only support
is a dual-CPU architecture, as shown in figure 1.
The main processor runs an open operating system and controls the entire system from the DBB (Digital Baseband Chip) where the processor is a wireless modem ), it mainly implements A/D conversion of voice signals, D/A conversion, encoding and decoding of digital voice signals, channel encoding and decoding, and timing control of wireless modem. Master-slav
ADSL is today a relatively affordable broadband access scheme, its billing is currently generally used in the way of the monthly. If a user uses an account to surf the internet, it is bound to be a bit not cost-effective, how to achieve an ADSL multiple users online? The following is an exchange of experience.
Sharing principle
In view of the current market mainstream Ethernet interface External ADSL modem has a built-in router, with routing functions
ADSL is today a relatively affordable broadband access scheme, its billing is currently generally used in the way of the monthly. If a user uses an account to surf the internet, it is bound to be a bit not cost-effective, how to achieve an ADSL multiple users on the Internet? The following exchange of experience.
Sharing principle: In view of the current market mainstream Ethernet interface of the external ADSL modem has a built-in router, with routi
1. Shared Internet access
(1) network connection
If you want to add an additional computer to share the Internet with ADSL, You need to purchase two more NICs, one installed on the Internet access computer, the other is installed on the computer to be shared (hereinafter referred to as the client. We recommend that you purchase a 10/100 Mbps white adaptive Nic. It is worth mentioning that if the ADSL modem is an external Ethernet interface, there will
Now there are more and more users using the ADSL Broadband Network, and the maintenance of the ADSL equipment has become a problem that cannot be ignored. Only by maintaining it well can you not only save your "Broadband Journey", but also prolong your life.
Routine Maintenance
The necessary routine maintenance for ADSL equipment can not only reduce unexpected faults, but also ensure smooth network and improve the service life of the equipment. The main routine maintenance includes the following
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.
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