Digital Subscriber Lines (DSL): Coming Soon to a Venue Near You?
Abstract
Will DSL come to a venue near you? ... To understand this question, one must define DSL and how it works. The letters DSL represents digital subscriber line. ... With this in mind, competition is to be had by the cable industry and the prospect of transferring data over power lines. However, whether DSL will be coming to venue near you is dependent upon the impact of federal regulations and policies which have come into play in recent years.
What is DSL and How Does It Work?
DSL is the abbreviation for digital subscriber line. ... DSL exploits this extra carrying capacity to carry data over the wire without interfering with voice communications. 1 Lets examine why DSL is able to perform this feat. ... The copper wiring enables the telephone lines to handle frequencies up to several million Hertz. By limiting the frequencies carried over the lines, the telephone system can consolidate wiring into a limited amount of space without causing interference between lines. Equipment that sends digital rather than analog data can safely utilize the telephone lines capacity. This is where DSL takes advantage of the telephone lines. 1
The rate of speed that you experience while connecting to the Internet is primarily based on the distance from the central office of the company providing DSL service. ... Typically, for speed and quality of service, many DSL providers limit the distances below the industry standard of 18,000 feet. DSL can provide maximum downstream speeds of up to 8 megabits per second (Mbps) at a distance of a bout 6,000 feet, and upstream speeds of up to 640 kilobits per second (Kbps). ... 2
So why is distance a limitation for DSL and not for voice telephone calls. ... The downside of the loading coils is that they are not compatible with DSL signals. A voice coil in the loop between your telephone and the telephone companys central office will not enable you to receive DSL. Other factors that might make DSL unavailable are:
· Bridge taps - These are extensions, between you and the central office, that extend service to other customers. ...
· Fiber-optic cables - DSL signals cannot pass through the conversion from analog to digital to analog if a portion of your telephone circuit comes through fiber-optic cables. ... With DSL, your computer is continuously connected to the Internet. ... 2
Competition
Cable
As reported by Jim Hu of CNET News, a study released on April 22, 2003 indicated cable modems are outpacing digital subscriber lines in terms of connection speeds, as household broadband access continues to increase. ... Cable modems, according to the study, were 50 percent faster on average than DSL connections. ... 2
In regards to security, cable is similar to DSL: you are continuously connected to the Internet with a static IP address.
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