ADSL (Asymmetric Digital Subscriber Line)
Asymmetric Digital Subscriber Line (ADSL) is a high-speed transmission technology. ADSL is an asynchronous system, which means that the data rate allowed is not equal in both directions. Therefore most ADSL lines have a far higher download speed than upload speed, which means that capacity is higher when coming at the end user, than it is leaving.
How ADSL Works
ADSL works by isolating the bandwidth of copper telephone lines into diverse frequency ranges, known as carriers. This enables the accommodation and transmission of several different signals on the same wire. To accomplish this, ADSL uses a process called Frequency Division Multiplexing (FDM), the carriers carry each of a different parts of the same data transmitted simultaneously, This helps to create more available bandwidth and higher speeds for the end user. In this way, ADSL can accommodate simultaneous high-speed data and voice transmission, such as surfing the web, watching streaming video, fax and voice call, all on the same line.
