Digital Subscriber Line & DSL Transmits Data

Описание: Digital Subscriber Line is becoming popular as a way to increase data rates in the local loop.
Instead of using the 0-4000 kHz voice channel, DSL uses the physical capacity of the copper phone lines of up to 1 MHz.
The 1 MHz capacity is split into: 1) a 4 kHz voice channel, 2) an upstream and 3) a downstream channels.
There are several versions of DSL, with the main differences being how much of the bandwidth is allocated between the upstream and downstream channels.
One form of DSL, G.Lite provides a 4 Khz voice channel, 384 kbps upstream and 1.5 Mbps downstream (provided line conditions are optimal). (a.k.a. ADSL or asymmetrical)