Monday, December 21, 2009

History of DSL

It 'started with the phone

It was not too long ago, when the Internet was not even a fantasy. Now, it is difficult to imagine a world without high speed Internet in every home. DSL (Digital Subscriber Line), is not always in that form since. Its history goes back all the way in 1800, when Alexander Graham Bell invented the telephone. For the first time the people of the situation, the data were transmitted over a copper cable. Soon heI know at the moment, an invention that would be powerful and influential, and what could be done, with his idea. However, he had laid the foundations for the construction of others.

Then came the Internet

Satisfied with the early Internet users were only simple single-color displays without graphics. But as technology advanced and the Internet began with full-color Web pages and images has become increasingly clear that users must be able to transmit largeAmounts of data. Together with the need for data users need for speed. It is not reasonable to simply wait for days to upload a photo.

In 1980, Joseph Lech Unfortunately, the solution for this problem. He discovered how the data is transmitted via broadband signals. To that end, he is credited as the father of broadband technologies. With the idea of broadband, came up with the idea, ADSL (Asymmetric DSL). This was significant because it allows usersDownloading data at a rate faster than they upload. This system reflects most people use the Internet to download uploaded a lot more points than ever, so the need for increased download speeds of upload speed.

ADSL connections began the transition from analog to digital connections. This technology has made its first appearance on the market in the form of ISDN (Integrated Services Digital Network), which is simply a network of digital phone connections, allowing the twothe transfer of voice and data around the world. This allows more data to be transmitted much faster and if it all comes down to speed is the ultimate goal of the Internet.

Then came DMT (Discrete Multitone), which was developed by John Cioffi. Contained a DMT ADSL signal into 256 frequency channels. Cioffi version of this technology has been dramatically better than all its competitors, and quickly became an industry standard.

HDSL (High Bit-RateDSL) was the version of DSL, which has been used more frequently. It was developed in the early 1990s and has the same amount of bandwidth in both directions. This was mainly used for transmission of data between the phone companies and consumers, and even within a society. Although HDSL provides equal bandwidth for uploads and downloads, I did not come without its flaws, needs more telephone lines to serve this function, which is not practical for off Average consumer.

Video On Demand

This technology also paved the way for video-on-Demand (VOD), which was designed, with the promise of cable TV offers over 500 channels to compete. The idea was that the DSL technology, consumers would be able to buy and all the movies they wanted without leaving the comforts of home to watch the download. While this seemed a good idea, just do not take too much.

Instead> DSL for VOD, the consumer uses the technology for high-speed Internet connections. With Internet users is growing exponentially each year, increased the demand for this service. Soon, consumers and businesses turned to for its DSL high-speed Internet needs.

Multiple types of DSL

From its humble origins, with regular copper wires, DSL come a long way over the years. Now, one of advanced technology, and DSL wasexpanded and includes:

ADSL - DSL with higher bandwidth for downloading than for uploading. This follows the common denominator of consumer back to send more messages from the server as a transfer within the server.

RADSL (Rate-adaptive DSL) - This technology allows software to determine how fast signals can be transmitted via telephone in accordance with the consumer and hence the speed of delivery is adjusted accordingly.

V-DSL(Very-high-data-rate DSL) - this is a very high data transfer speed, works best over short distances. This type of DSL works better with a fiber optic cable.

The future of DSL

With so 'many applications for high-speed DSL Internet and the future looks promising. Consumers around the world are equipped with free high speed internet for shopping, online courses Gamming, chat, downloading music and movies and home-based businesses. Withthe ever increasing demand for Internet and services it provides, the future looks good for DSL - is here to stay.

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