ADSL stands for "Asymmetrical Digital Subscriber Line," a broadband technology using telephone lines and digital coding to create an Internet connection from your computer. That connection can carry vast amounts of voice, video and data information at very high speeds . More importantly, DSL is a constant connection to the Internet. Since you don't have to dial in, there are no busy signals. You will not get disconnected, as is always the case with a dial-up connection through a regular modem . .
ADSL works on frequency differentiation ? the frequency used by voice is different from that used by data, which is why you can use the phone and the Internet at the same time.....