What is DSL Internet and How Does it Work?

What is DSL Internet?

DSL stands for Digital Subscriber Line. Users get a high speed bandwidth connection from a phone wall jack on an existing telephone network. DSL works within the frequencies that the telephone doesn’t so you can use the Internet while making phone calls.

How does DSL work?

Consider DSL Internet the big brother to dial-up. Many local phone services provide DSL offering High Speed Internet access delivered through existing telephone networks. Telephone wires carry hundreds of thousands of frequencies. Only a few thousand are for telephone communications so the telephone and DSL modem can work at the same time.
There are two main types of DSL technology.
Symmetrical DSL– Symmetrical connections offer equal bandwidth for upload and download speeds.
Asymmetrical DSL– This is the most popular type of DSL connection. Most people download more information than they are uploading. Because of this, an asymmetrical connection has more downstream bandwidth and less upstream bandwidth.

Is DSL right for me?


  • Because it is built on existing phone lines, DSL is widely available.
  • It costs less than satellite or broadband Internet connections.
  • With DSL, each Internet subscriberhas a dedicated circuit, just as they would with phone service. Several subscribers online at once don’t put a heavier demand on DSL lines. With cable Internet, neighboring subscribers share a cable, so the connection can be slowed during peak Internet usage times.


  • There are faster types of Internet connections, but these usually cost more.
  • DSL connection is distance-sensitive, meaning the connection is better the closer you are to the central office. When you get farther away, the signal decreases and the speed slows.

DSL Internet is available wherever there is an existing telephone network, and it offers a reliable and affordable connection.

You can order DSL internet from internet providers like AT&T.