There are several types of DSL available. They include Asymmetric Digital Subscriber Line (ADSL), Consumer DSL (CDSL), ISDN DSL (IDSL), High bit-rate Digital Subscriber Line (HDSL), and G.Lite also known as DSL lite, splitterless ADSL, or Universal ADSL .

ADSL is probably going to become the most used DSL in homes and small businesses. It provides a large amount of bandwidth for accessing the Internet, but limited bandwidth for uploading to the Internet. With ADSL you are able to use your phone, while on the Internet.

CDSL is an antiquated version of DSL, which is no longer marketed. It is slower than other forms of DSL.

IDSL is slower than ADSL and has a speed close to a standard telephone line or ISDN.

HDSL is used primarily by businesses because it offers the same amount of bandwidth for both uploading and downloading. It is one of the first types of DSL services available.