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DSL (Digital Subscriber Line) - a technology for bringing high-bandwidth information to homes and small businesses over ordinary copper telephone lines. 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 competes with the cable modem and satellite transmission for high-bandwidth information reception. Business - List of business/finance/loan/mortgage resources Computers - List of computer hardware/software/peripheral resources Internet - List of webhosting/webdesign/internet marketing resources Software - List of software resources Web Design - List of web design/development resources Web Hosting - List of web hosting resources Web Promotion - List of search engine optimization/internet marketing resources Web Resources - List of other web resources Recreation - List of travel/hotel/cruise resources Casino - List of online gambling/poker/blackjack/roulette resources Health - List of online pharmacy/hospital/health resources Shopping - List of online shopping/gift resources Miscellaneous - List of all other resources not stated above
ADSL (Asymmetric Digital Subscriber Line - the form of DSL most familiar to home and small business users. ADSL is called "asymmetric" because most of its two-way or duplex bandwidth is devoted to the downstream direction, sending data to the user. Only a small portion of bandwidth is available for upstream or user-interaction messages. However, most Internet and especially graphics- or multi-media intensive Web data need lots of downstream bandwidth, but user requests and responses are small and require little upstream bandwidth. DSLAM (Digital Subscriber Line Access Multiplexer) - a device that interconnects multiple DSL users to a high-speed backbone network. Typically, the DSLAM connects to an asynchronous transfer mode (ATM) network that can aggregate data transmission at gigabit data rates. At the other end of each transmission, a DSLAM demultiplexes the signals and forwards them to appropriate individual DSL connections. |
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