Hardware Setup
14
N150 Wireless ADSL2+ Modem Router DGN1000v3
ADSL Microfilters
If this is the first time you have cabled a modem router between a DSL phone line and your
computer or laptop, you might not be familiar with ADSL microfilters. If you are, you can skip
this section and proceed to Cable Your Modem Router on page 15.
An ADSL microfilter is a small inline device that filters DSL interference out of standard phone
equipment that shares the same line with your DSL service. Every telephone device that
connects to a telephone line that provides DSL service needs an ADSL microfilter to filter out
the DSL interference. Examples of devices are telephones, fax machines, answering
machines, and caller ID displays. Not every phone line in your home necessarily carries DSL
service. That depends on the DSL service setup in your home.
Note: Often the ADSL microfilter is in the box with the modem router. If you
purchased the modem router in a country where a microfilter is not
included, you need to acquire the ADSL microfilter separately.

One-Line ADSL Microfilter

Plug the ADSL microfilter into the wall outlet and plug your phone equipment into the jack
labeled Phone. The modem router plugs directly into a separate DSL line. Plugging the
modem router into the phone jack blocks the Internet connection.
Plugs into DSL line
.
Figure 6. One-line ADSL microfilter
If you do not have a separate DSL line for the modem router, the best solution is to use an
ADSL microfilter with a built-in splitter (see the next section, Two-Line ADSL Microfilter).
If you do not have a separate DSL line for the modem router, the second-best solution is to
get a separate splitter. To use a one-line filter with a separate splitter, insert the splitter into
the phone outlet, connect the one-line filter to the splitter, and connect the phone to the filter.

Two-Line ADSL Microfilter

Use an ADSL microfilter with a built-in splitter if you have a single wall outlet that provides
connectivity for both the modem router and your telephone equipment. Plug the ADSL
microfilter into the wall outlet, plug your phone equipment into the jack labeled Phone, and
plug the modem router into the jack labeled ADSL.