If you are trying to get a new DSL connection installed and you are having trouble with line noise, you may need to find a DSL line filter. A DSL filter is a device that removes excess noise from the phone line so you can get a clear and strong enough signal for high speed DSL internet. DSL phone filters are commonly used in situations where a home has old telephone wiring, and many ISPs include a DSL phone filter with their DSL installation kit as a matter of course (station protector DSL filters), though you should be careful to make sure that they do provide a DSL filter before you choose an ISP and be ready to buy DSL inline filters if they do not and you run into trouble while setting up your DSL.

You can buy a telephone wall jack with DSL filter pre-installed (telephone module DSL filter) if you are renovating and don't want DSL filters sticking out of the walls. If you have an alarm system that uses the phone lines you may need an alarm system DSL filter to prevent interference with your DSL signal. DSL filter structured wiring can help to reduce noise on the line and interference from electrical devices in the environment. If you want to use one wall jack to connect multiple computers or devices to DSL then you can find a special DSL splitter filter. For more info on DSL filters, their designs and measurements you can try looking for a search term such as 'I am looking for DSL filters', 'DSL filter schematic' or 'DSL measurement filters' on a major online search tool such as Google or MSN. While there are all kinds of DSL filters available for sale, most of them are fairly simple and cost no more than a couple of dollars. If you are new to DSL, don't worry too much about buying the wrong kind of DSL filters, as they are largely interchangeable. The only problems you are likely to run into getting a DSL filter is whether it will fit against the wall if you have furniture and things obscuring the wall jack. In general, buying a DSL filter is an easy task.

Good luck finding DSL filters on the world wide web; with just a little time spent searching I am sure you can find a DSL filter that will suit your needs!