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DSL
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Another great aspect of wireless dsl modem units is that they can be easily upgraded. Think of dial-up internet service as trying to run a lot of water through a small pipe. High speed DSL makes you fast and portable. Turn it off, than see if that fixes the problem. They provide a customizable gateway, or home page, that usually offers fast access to news feeds, email, and new multimedia content that's keyed to your IP address. DSL filter is an analog, which is installed on the telephone lines or some other type of analog devices, to ensure outside interference is prevented when DSL services are functioning on one line.
dsl connections
Take notes on what they tell you so that when you are finished, you can evaluate what all the offers are. We'll help you figure that out. Pretty much everybody types their name in to the world's most popular search engine, for starters, just to see how famous they are. This type of customer pampering will be on for at least one more decade, till the usage of satellite dish antenna catches the fancy of the public.
DSL, or 'digital subscriber line', is that handy set of technologies that allows you to browse the internet at warp speed. This technology suddenly appeared in homes around the world during the 1990s. But where did it come from, and how exactly does it work? Let's find out.
Origin
Back in the 1980s, engineers were poking around for a way to get bits of information from one computer to another via telephone lines. They figured out a way to do this using already-installed telephone lines. Joseph Lechleider, an analyst at Bellcore, and John Cioffi, who founded the Amati engineering firm, came up with the mathematical analysis and circuits that make DSL possible.
Telephone companies initially weren't thrilled with DSL, because the technology gave customers the option of using their pre-existing phone line for internet service instead of having to pay for a second phone line. Prior to broadband, modems had to dial up to a service provider, so customers typically had two separate lines; one for the phone and one for the modem.
However, as more and more media-rich content became available on the internet phone companies joined the technology train. Today, many companies, like AT&T, market their own brand of DSL service. Eventually the telephone companies realized that DSL saved them money since it didn't require digging new trenches for additional phone wiring, as would be the case when installing fiber optic cables to provide the same broadband access.
How DSL Works
For more than one hundred years, telephone lines have consisted of a pair of copper wires running from a main trunk owned by the phone company to a consumer's house. Copper is great for being able to carry a wide range of frequencies. This range is also called its "bandwidth."
The frequency range of the human voice is from 300 to 3,400 Hz. The telephone companies liked limiting the bandwidth because it allowed them to bundle many wires together at a central location without having any distortion caused by overlapping frequencies.
That leaves a lot of unused bandwidth - more than a million HZ -- on the copper wire, and that's why engineers started looking at using it for DSL in the first place.
DSL also splits the digital signals being carried by the copper wire into upstream and downstream channels. Market studies showed that internet users download more content than they upload, or send. So DSL makes the downstream channel three to four times faster than the upstream channel.