HDSL - High bit digital subscriber line

HDSL


What does HDSL stand for? High-bit-rate Digital Subscriber Line. When I first took on this topic I really was not sure what HDSL stood for. I knew about DSL but there were so many forms of DSL I really did not know one from the other. So I started at the basics.
What is DSL? A digital subscriber link, a way to digitally connect residences and businesses to the Internet or remotely to a LAN. DSL offers high-speed transmission over already existing twisted-pair copper wire. The twisted-pair copper cables into homes or offices can usually carry more than 64 kb/s but the telephone company needs to handle the signal as digital rather than analog. DSL is an alternative to ISDN, it is offered in many variations such as ADSL, SDSL, HDSL, and VDSL. So the term xDSL was formed, implying the "x" could be any one of the variation variables.
This has been in use for some years in some countries to provide broad band facilities to business premises (leased line), providing 2 Mbps ...