Digital phone line from the xDSL family.

Considered the fastest xDSL technology, it can achieve a maximum transfer rate between 13 to 52 Mbps downstream (download) and between 1.5 and 2.3 Mbps upstream (upload).

Physically it used a copper wire pair. Its distance between the phone company and the installation point must be between 985 and 4,495 feet (300 and 1,370 meters).