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DSL (Digital Subscriber Line) is a technology for bringing high-bandwidth information to homes and small businesses over ordinary copper telephone lines. xDSL refers to different variations of DSL, such as ADSL, HDSL, and RADSL. Assuming your home or small business is close enough to a telephone company central office that offers DSL service, you may be able to receive data at rates up to 6.1 megabits (millions of bits) per second (of a theoretical 8.448 megabits per second), enabling continuous transmission of motion video, audio, and even 3-D effects. More typically, individual connections will provide from 1.544 Mbps to 512 Kbps downstream and about 128 Kbps upstream. A DSL line can carry both data and voice signals and the data part of the line is continuously connected. DSL installations began in 1998 and will continue at a greatly increased pace through the next decade in a number of communities in the U.S. and elsewhere Business - All business/finance/loan/mortgage related link can be found here Computers - All computer hardware/software/peripheral related link can be found here Internet - All webhosting/webdesign/internet marketing related link can be found here Software - All software related link can be found here Web Design - All web design/development related link can be found here Web Hosting - All web hosting related link can be found here Web Promotion - All search engine optimization/internet marketing related link can be found here Web Resources - All other web related link can be found here Recreation - All travel/hotel/cruise related link can be found here Casino - All online gambling/poker/blackjack/roulette related link can be found here Health - All online pharmacy/hospital/health related link can be found here Shopping - All online shopping/gift related link can be found here Miscellaneous - All other links can be found here
Traditional phone service (sometimes called POTS for "plain old telephone service") connects your home or small business to a telephone company office over copper wires that are wound around each other and called twisted pair. Traditional phone service was created to let you exchange voice information with other phone users and the type of signal used for this kind of transmission is called an analog signal. An input device such as a phone set takes an acoustic signal (which is a natural analog signal) and converts it into an electrical equivalent in terms of volume (signal amplitude) and pitch (frequency of wave change). Since the telephone company's signalling is already set up for this analog wave transmission, it's easier for it to use that as the way to get information back and forth between your telephone and the telephone company. That's why your computer has to have a modem. |
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