ADSL Internet speed is slow

Use ADSL Internet, with use, the speed of the Internet is more and more slow, the reason that ADSL visit speed is slow is below two points.

1.ADSL has a high quality requirement for the telephone line. The use of ADSL is a RADSL (Rate adaptive ADSL), if the Telecommunications Bureau of the server room to the user between the telephone lines in a certain period of time by external factors of interference, RADSL will be based on the quality of the line and transmission distance to dynamically adjust the user's access speed.

2. If you visit a foreign site, the access will be affected by factors such as export bandwidth and the configuration of the other site.