If you connect to the Internet, you can connect through a regular modem, through a local area network connection with your location, through a cable modem or digital subscriber line (DSL) connection. DSL is a very high-speed connection that uses the same standard telephone wires.
Here are some advantages of DSL:
* You can leave your Internet connection open and still use phone lines for voice calls.
* The speed is much higher than normal modem
* DSL does not necessarily require new wiring, it can be used to phone you already have.
* The company, which offers DSL modem is usually provided as part of the installation.
But there are also disadvantages:
* A DSL connection works better when you are closer to the provider's central office. The further away from your central office, the signal becomes weaker.
* Community is faster for receiving data it is sending data through the Internet.
* This service is not available everywhere.
In this article, we explain how the DSL connection manages to squeeze more information on a standard telephone line - and you can make regular phone calls even when you're online.
Telephone
If you have read How phones work, then you know that a standard telephone installation in the United States consists of a pair of copper wires that the phone company installs. The copper wires are much space to carry more than your phone conversations - they are considered a much larger frequency Bandwidth, or if a voice. DSL uses this "extra capacity to carry information on the wire without disturbing the line's ability to carry conversations. The whole scheme is based on the choice of particular frequencies to specific tasks.
To understand DSL, first of all should know some things in a normal phone line - the kind that telephone professionals call Pots Plain Old Telephone Service. One option is that most of the traps, the phone company's wires and equipment, by limiting the frequencies of switches, phones and other devices will. Human voices, speaking in normal conversational tones may be transported in a frequency range from 0 to 3400 hertz (cycles per second - see How phones work great for a demonstration of this). This band is very small. For example, to compare him to the rank of most stereo speakers, which cover about 20 hertz to 20,000 Hz. And the wires themselves have the potential to deal with frequencies up to several million hertz in most cases. --
Using such a small percentage of the total wire Bandwidth is historical - remember that the phone system is in place, using a pair of copper wires in each of their countries, about a hundred years. By limiting the frequencies carried over the lines, the phone system can pack a lot of wires for a very small without worry about the differences between the lines. Modern equipment that sends digital rather than analog data can safely be used much more, including a phone line capacity. DSL does just that.
