Asymmetric Digital Subscriber Line ADSL, a new technology that allows more data to be sent over existing copper telephone lines (POTS).
21st Century Technologies provide you with ADSL that supports data rates of from 1.5 to 9 Mbps when receiving data (downstream rate) and from 16 to 640 Kbps when sending data (upstream rate).

To satisfy you better, 21st Century provides you with a special ADSL modem to ensure that your business is always on.