Tuesday, January 25, 2011

What is the Function of DSL?

DSL is a method for connecting to the Internet. It is a high-speed connection for desktop and laptop computers. DSL connections require a special modem and use your existing copper telephone lines. Before choosing a DSL provider, consider the price, connection speeds, and other features to ensure that you have the speediest connection possible.

Need for High-Speed Internet

When the Internet was first popularized, there was not much of a need for high-speed, "broadband" Internet connections. Users could check discussion boards, send and receive basic email messages and browse websites. These websites were relatively small in file size. However, as Internet technology has developed, the need for higher speed browsing has increased.

Select Internet Connection Methods

DSL is one of several Internet connection methods. Dial-up connections require the use of a telephone line and have speeds of up to 56 kilobytes per second. It is the slowest of methods. ISDN connection also requires a telephone line and a router and has connection speeds between 64 and 128 Kbps. Cable modems use a cable line to bring users between 512 Kbps and 20 Mbps. The most common connection are wireless connections, which have connection speeds of 30 Mbps.
DSL Connections

DSL, or digital subscriber line, uses the unused part of copper phone lines to send and receive data. It requires a special modem and an adapter card to connect to your computer. It connects with speeds between 128 Kbps and 8Mbps. The system does not interfere with your normal phone use, and its bandwidth if affected by the distance from the network. It has to be located within 3 miles of the phone company's switch.

DSL Types

There are four types of DSL connections: ADSL, SDSL, ISDL and RADSL. ADSL offers faster download than uploading speed. It's the most common connection. SDSL connections have symmetric download and upload speeds. IDSL is slower, as it provides a 144kb per second maximum connection, but is available at farther distances than other DSL types. Finally RADSL connections vary depending on the line's conditions.