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DSL
dsl broadband internet access
We will take a look at the different opinions that users have for this type of modem. Finally, run a virus scan and delete your web browser cache. Then go online to find a speed test - there are several on the web that won't cost anything and don't take much time. Turn it back on, and once all the lights on the front of the modem stop blinking and turn green, you should have a brand-new connection to your DSL service. Cheap DSL is a good idea for anyone who regularly accesses the internet as you get great service and save money at the same time. Then look on the internet, yellow pages and government websites for any local ISP providers and call them all.
dsl vs cable broadband
As far as these people are concerned, the unit worked reliably, even on two computers over a three-year span of time. No worries; there are still ways to boost your DSL speed. Several websites have compiled massive libraries from what's available, including the entire works of William Shakespeare. You need to be within 18,000 feet to receive DSL service in the first place, but for every 1,000 feet closer you get to the office, expect a bump in speed of at least 1,000 kilobits per second. This means you are future-proofing the unit for both you and the service providers.
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.