Asymmetric Digital Subscriber

Some articles on subscriber, digital subscriber:

Digital Subscriber Line - DSL Technologies
... The line-length limitations from telephone exchange to subscriber impose more restrictions on higher data-transmission rates ... DSL technologies (sometimes summarized as xDSL) include ISDN Digital Subscriber Line (IDSL), uses ISDN based technology to provide data flow that is slightly higher than dual channel ISDN ... High Data Rate Digital Subscriber Line (HDSL / HDSL2), was the first DSL technology that used a higher frequency spectrum of copper, twisted pair ...
Very High Speed ADSL - DSL Technologies
... The line-length limitations from telephone exchange to subscriber impose more restrictions on higher data-transmission rates ... DSL technologies (sometimes summarized as xDSL) include ISDN Digital Subscriber Line (IDSL), uses ISDN based technology to provide data flow that is ... High Data Rate Digital Subscriber Line (HDSL / HDSL2), was the first DSL technology that used a higher frequency spectrum of copper, twisted pair cables ...