ADSL stands for Asymmetric Digital Subscriber Line, which is a form of high-speed Internet access using standard phone lines. Unlike the standard modem, which can only provide download speeds of up to 56 kbps, ADSL can provide you with download speeds of up to eight mbps.
The download speed ADSL provides is variable, depending on your distance to the central office or to a remote router. The maximum download speed of eight mbps is only possible if you live within one mile of the office. The typical ADSL subscriber can expect download speeds of up to four mbps.
The main disadvantage of the ADSL is the fact that its high speed is only one-way. The upload speed of this Internet service is very slow, nearly comparable to a dial-up connection. This is why ADSL is heavily marketed to passive internet users, those that do not upload files on a regular basis. The typical Internet user only uses the Internet to download information. Therefore, high speed for one direction is generally adequate for them.
ADSL Line Tester Information
When using ADSL, your connection speed will vary with your distance to the central office. You will need a way to test the speed of your line. This is what an ADSL line tester is for. It will calculate your distance from the central office, or router, and determine the data rates possible. Having a line tester will assist your service provider in accelerating the installation of your service.
Different testers will give you different functions. A basic line tester can ping your line. It will send out a signal and measure the time it takes for it to reach its destination and come back to you. More advanced line testers can do more than simply ping your line. Some can also test all the functions of your DSL modem, as well as check the physical layers of the connection.