DSL-510 ADSL Router User’s Guide
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Appendix B – 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.
For some ADSL clients, a telecommunications technician will be sent to the client’s premises 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, ISP or telephone company about where
and how you should connect the Router to the ADSL line.
In-Line Filters
Two common styles of low pass filters are shown in this section, the first is an in-line filter and is illustrated in below. In-line
filters are easy-to-install, in-line devices, which attach to the telephone cable between the telephone and wall jack.
In-Line Filter Installation
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
