Offers ADSL internet consist of high speed to homes and business connection via standard copper telephone lines. An ADSL line filter is a small device that connects to the phone Plug and must be installed on all lines on the premises with the exception of the ADSL modem’s line. The frequencies used by the ADSL service are a bandwidth superior to those used by the voice traffic, but the signals in the lower end of the band of ADSL and signals from the top of the band of voice traffic can interact creating static, echoes and other anomalies interference. Lines that run to the analog modems and fax machines should also be used with a line of ADSL filter. In some cases those who create ADSL offerings provide customers of modems so they can install them with one or more filters according to the ADSL offering calls. In some cases people prefer the configuration of ADSL services by a divider entry line in the incoming telephone line at the point of entry into the building.
To split the line into two separate stages, a single line ADSL filter can be placed. The remaining filter line will go directly to a single shot where the ADSL modem is installed. This configuration has the advantage of using only an ADSL filter, but someone expert must install the line splitter. In addition, unfiltered wall outlet is the only place that the modem can operate. Original author and source of the article