ADSL is a new technology which further increases the transmission volume of twisted pair cop-per followed by HDSL,It enables twisted pair copper to keep getting fatter in aspect of its application fea-ture.

• ADSL技术是继HDSL技术之后进一步扩大双绞铜线对传输容量的新技术，使双绞铜线对的应用前景更广阔。