Asymmetric Digital Subscriber Line (ADSL) is a type of broadband Internet access that allows a subscriber to download data at higher speeds than they can upload it. This means that users will be able to download large files and play online games with less lag, but they won’t be able to run programs that require a lot of bandwidth or transfer large amounts of information.
ADSL was developed in the mid-1990s by Bell Labs in the USA as a solution for providing Internet access to rural areas where installing cable would be expensive or impossible. By using existing copper telephone lines, ADSL could be installed quickly and cheaply while still providing service comparable with traditional dial-up modem access. In fact, ADSL can provide speeds up to 8Mbps downstream (downloading files) and 1Mbps upstream (uploading files). Today, many small businesses use DSL connections as well as home users who don’t have fiber optic or cable connections available.
ADSL is a type of high-speed Internet connection that uses the existing copper wires in your home or office to deliver broadband access. It’s different from other types of Internet connections, such as cable and fibre optic, because it delivers slower speeds over longer distances with less signal strength.
When you use ADSL, your Internet service provider (ISP) sends a signal down one wire, called the “local loop” or “last mile,” to your house or office. The signal travels along the copper wire until it reaches a high-frequency filter that blocks out any interference before it reaches the modem. The modem converts the signal into an electrical current and sends it through a transformer to boost its power level. Then, the modem converts this current back into digital data that can be transmitted over the phone line at high speeds.
This process is known as modulation, which involves taking information in one form and converting it into another form — usually binary data — for transmission over a network or from one device to another device on a network. Modulation also includes coding schemes used when transmitting data over networks such as Ethernet or Wi-Fi.
How ADSL Works
In order for your computer or other device to receive an ADSL signal from your ISP’s central office, it has to be connected by phone line cabling, which can be installed either inside or outside the walls of your home or business building. The signal travels along this cable until it reaches your computer’s modem, which converts it into an Ethernet connection so it can be used by computers, smartphones and other devices on your network.
Read more information here on Asymmetric Digital Subscriber Line (ADSL).