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This can be to some extent attributed to the fact that the dotcom boom began in California. The speed is mostly divided between uploading and downloading of files. There might be a larger telecomm in the area, but if the small provider is geographically closer to your home or office then they'll deliver the better quality DSL signal and speed. However it is a good idea to check that your DSL internet provider comes with some form of virus protection that works best with your choice of DSL internet access, virus protection is an added plus. What's the 'Broad' in Broadband DSL?
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Once the upstream and downstream channels are established they are used to connect the required parties to the internet service provider. The amount you'll pay for accessing the internet while traveling will vary greatly depending on the DSL provider. Finally, run a virus scan and delete your web browser cache. This is an acronym buried within an acronym. Due to lack of maintenance, the connection (both DSL and cable) can become pretty bad. You can ask the company, of course, but it's better to investigate on your own - no company will steer you to bad references!
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.