A standard modem?s job is to convert data from its digital form to analog form, which are then transferred over a phone line and reverse done while receiving data from the telephone line to your computer. By doing both modulating and demodulating the data signals, it is called to be a Modem.
DSL Is Really Very Easy To Understand – Needs and Compatibility
Easy to understand DSL information plus compatibility tests from the http://paradisewireless.com/dsl.htm webpage. It is no big deal to get an understanding about what it is, how it works and how it compares to your other choices for getting high speed internet access.