FAQs about ADSL Internet connection

1. What is the simplest troubleshooting method for ADSL?

A: You can preliminarily judge the problem based on the signal light display on the ADSL modem panel, as shown below:

"ADSL" Light: used to display the synchronization status of the modem. The green light indicates that the modem and the local terminal can be normally synchronized; the red light indicates that the modem is not synchronized; and The flashing green light indicates that synchronization is being established.

The "10baset" light is used to show whether the modem is connected to the NIC or hub normally. If the light is not on, the modem cannot connect to the computer. When there is data transmitted in the network cable, the light will flash slightly.

The "ATM 25" light shows the status of 25 ATM ports, which is generally not used.

The "Maint" light is related to remote management. It is usually on.

"Power" light, power display.

2. Will using ADSL to access the Internet Cause the quality of telephone services to decline? In addition, will 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.

3. Why is the access speed of ADSL faster than that of common dial-up modem?

A: The access speed of ADSL is slow as follows:. if you visit a site outside China, the access will be affected by factors such as Outbound bandwidth and the configuration of the site of the other party; B. because ADSL technology has high requirements on the quality of telephone lines, and currently uses a radsl [speed-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.

4. Why does ADSL sometimes fail to access the Internet normally?

Answer: ADSL is a Transmission Technology Based on twisted pair wires. Twisted Pair wires wrap two insulated copper wires together with each other according to certain rules, so as 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.

5. According to the ADSL speed, the local download speed should be above 1 MB. Why is the actual speed between-kb?

Answer: The unit of speed. The maximum download speed of a 56 K modem is 5-6 K. The unit of 56 K is bit, And the download speed is byte. 1 byte = 8bit. Therefore, when the download is 1.6 kb, it actually reaches Mbit, which is quite fast. Because of the server and client hard disk read and write speed and many other reasons, the local download speed can not play the maximum capacity of ADSL2-8Mbit/s.