Microfilters And Splitters; Microfilters - D-Link DSL-210 User Manual

Microfilters and Splitters

Most ADSL clients will be required to install a simple device that prevents the ADSL line from interfering
with regular telephone services. These devices are commonly referred to as microfilters or sometimes
called (inaccurately) line splitters. They are easy to install and use standard telephone connectors and
cable.
Some DSL service providers will send a telecommunications technician to modify the telephone line,
usually at the point where the phone line enters the building. If a technician has divided or split your
telephone line into two separate lines - one for regular telephone service and the other for ADSL – then
you do not need to use any type of filter device. Follow the instructions given to you by your DSL service
provider about where and how you should connect the Modem to the ADSL line.

Microfilters

Unless you are instructed to use a "line splitter" (see below), it will be necessary to install a microfilter
(low pass filter) device for each telephone or telephone device (answering machines, Faxes etc.) that
share the line with the ADSL service. Microfilters are easy-to-install, in-line devices, which attach to the
telephone cable between the telephone and wall jack. Microfilters that install behind the wall plate are
also available. A typical in-line microfilter installation is shown in the diagram to the right.
Note:
Do not install the microfilter between the Modem and the telephone jack.
Microfilters are only intended for use with regular telephones, Fax
machines and other regular telephone devices.
DSL-210 USB ADSL Modem User's Guide
In-Line Microfilter
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