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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 ADSL service providers will send a telecommunications technician to modify the telephone
line, usually at the point where the telephone 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 ADSL service provider about where and how you should connect the Router 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 shares 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 below.
Do not install the microfilter between the Router and the telephone jack. Microfilters
are only intended for use with regular telephones, Fax machines and other regular
telephone devices.
Note
DSL-502T ADSL Router User's Guide
Microfilter Installation
59
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