HDSL(High Data rate digital subscriber line)?

Question

I need a overview of the technology and how this tecnology achieves high speed tranmission

Any useful resources will be helpful

Answer 1

High Data Rate Digital Subscriber Line (HDSL) was the first DSL technology that uses a higher frequency spectrum of copper, twisted pair cables. HDSL was developed in the USA, as a better technology for high speed, synchronous circuits typically used to interconnect local exchange carrier systems, and also to carry high speed corporate data links and voice channels, using T1-lines.

T1 circuits operate at 1.544 Mbit/s. These circuits were originally carried using a line code called AMI-Code (Alternate Mark Inversion). AMI did not have sufficient range, and required the application of repeaters over long circuits, consuming a great deal of power.

Answer 2

HDSL (High bit-rate Digital Subscriber Line), one of the earliest forms of DSL, is used for wideband digital transmission within a corporate site and between the telephone company and a customer. The main characteristic of HDSL is that it is symmetrical: an equal amount of bandwidth is available in both directions. HDSL can carry as much on a single wire of twisted-pair cable as can be carried on a T1 line (up to 1.544 Mbps) in North America or an E1 line (up to 2.048 Mbps) in Europe over a somewhat longer range and is considered an alternative to a T1 or E1 connection.

Answer 3

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