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What Is An SDSL Line?

May 27, 2008
SDSL Broadband (known as; Symmetric Digital Subscriber Line) can provide you with high speed internet access over ordinary copper telephone wires. It is primarily used by small to medium businesses. These broadband connections allow an equal download and upload speed. For many small business and at home workers this type of broadband offers a convenient, affordable replacement for ADSL and still falls under the price margin of a T1 connection.

Unlike the other DSL connections, an exclusive dedicated copper pair-line is required because with this technology there is no sharing of line resources, this then hinders the use of other phone and fax line services. Although a SDSL Broadband line is dedicated, there is no actual special wiring involved; the broadband line uses the same type of copper wiring as voice phone lines. Therefore connection speeds are similar to other DSL connections, ranging from 512k to 2MB. Also, the inclusive nature of this broadband service eliminates the need for the use of a Microfilter.

A SDSL Broadband line runs from the Central Office Hub to a standalone DSL modem at the users end. The length of the line is directly inversed in concern with the connection speed; that is the further away from the Central Office, the longer the broadband line wire and the less speed available for use. Thus the fastest speed you can get all depends on the distance between Central Office and the DSL modem; this distance is the length of the copper pair, which is probably more than the direct, straight line distance.

The central office hub is usually located in the city centre or in the business district of a community. If the Central Office is too far, providers sometimes may consider putting in a "remote central office", also called a Remote DSLAM. If a remote DSLAM is installed, the copper distance starts from the remote Central Office instead of the main Central Office. These are usually installed where there is a high concentration of potential customers.

In some very rare instances, very few clients might not be able to get SDSL Broadband connection because of their location. This may be due to them being is too far away from the Central Office and the installation of a remote DSLAM is impractical. Also, sometimes the lines have impairments that prevent having a suitable all copper connection, which oppose the purpose of a SDSL Broadband connection which aims to utilise the whole bandwidth of the copper pair-line. In such cases, other DSL Broadband connections should be sought after.

SDSL Broadband line consumption usually requires users to install separate or even second phone lines. Installation of such a line is pretty basic and not very complicated because of the similarities between regular phone and fax services lines and the SDSL Broadband line. Because this broadband has a higher monthly cost than a residential DSL, the providers will tend to work harder to make sure the installation is successful and glitch free for the duration of the line usage.
About the Author
Derek Rogers is a freelance writer who writes for a number of UK businesses. For Business Internet Services he recommends Iconnyx, a leading SDSL provider.
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