You can leave your Internet connection open and still use the phone line for voice calls.

DSL is always "up". There is no delay to connect waiting for " dialing ".

The speed is much higher than a regular modem (1.5 Mbps or higher vs. 56 kbps)

DSL doesn't necessarily require new wiring; it can use the phone line you already have.

The company that offers DSL will usually provide the modem inexpensively as part of the installation.