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DSL-504T User’s Manual
D-Link Systems, Inc.
App. C: 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 is optional 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.
Appendix C: Microfilters & Splitters
Microfilter Installation
Important: 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.
Summary of Contents for DSL-504T
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