Using DSL Telephones

The term DSL is short for Digital Subscriber Line. It provides the transmission of data over the wires of a local telephone network.

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DSL, originally, was the abbreviation for digital subscriber loop, but the name was changed to Digital Subscriber Line, as it was, a more market friendly term, for the most popular version of the recently introduced consumer ready DSL.

The speed of downloading, of a consumer service of DSL, ranges from about two hundred and fifty kilobytes per second to twenty four thousand kilobytes per second. This depends on the technology of DSL, the conditions of the line being used and the level of service implemented. Generally, the speed of uploading is lower than the speed of downloading for ADSL (Asymmetric Digital Subscriber Line). It is equivalent to the downloading speed of SDSL (Symmetric Digital Subscriber Line).

The technology connects a computer with the Internet via the existing copper telephone lines. Special equipment is used to modulate digital information, at the centralized telephone office and the modem of DSL connected to the computer system in use. This equipment then sends the modulated information, through phone lines, using unused frequencies. Regular signals of voice are transmitted across the telephone lines at frequencies that range from zero to four kilohertz.

Since a standard dial up modem, uses the frequencies similar to those of voice, the rate of transmission of data is limited. On the other hand, a DSL Telephone utilizes frequencies that range between twenty-five kilohertz to one megahertz. The bandwidth is extra, this means that the DSL telephones can send much more data through the same connection of copper wire. The signals of telephones and DSL can very comfortably exist on the same line, which is under usage. A micro filter of DSL is installed at every outlet that is used for making telephone calls.

Most of the DSL Telephone modem packages provide small filters for in lining. These DSL modems are readily available at any store that sells computers or electronics. The filter of DSL telephones takes care any signals that are unwanted by the user, and that are picked by the telephone and transmitted as static signals to the user. The technology also provides notable improvements in the speeds of Internet over those that are provided by the standard dial up modems connections. The best advantage that a user gets, by using a DSL Telephone, is that the signals of DSL are always on, whether the attached computer is on or not.