Hardware Setup
13
N600 Wireless Dual Band Gigabit VDSL2 Modem Router DGND3800B
ADSL Microfilters
If this is the first time you cable a modem router between an ADSL phone line and your
computer, 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
14.
An ADSL microfilter is a small in-line device that filters ADSL interference out of standard
phone equipment that shares the same line with your ADSL service. Every telephone device
that connects to a telephone line that provides ADSL service needs an ADSL microfilter to
filter out the ADSL interference. Example devices are telephones, fax machines, answering
machines, and caller ID displays. Note that not every phone line in your home necessarily
carries ADSL service. That depends on the ADSL service setup in your home.
For many products, the ADSL microfilter is included in the box with the modem router. If you
purchased the modem router in a country where a microfilter is not included, you have to
acquire the ADSL microfilter separately.
One-Line ADSL Microfilter (Not Included)
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 ADSL line. Plugging the
modem router into the phone jack blocks the Internet connection. If you do not have a
separate ADSL line for the router, the best thing to do is to use an ADSL microfilter with a
built-in splitter.
Plugs into the ADSL line
Figure 5. One-line ADSL microfilter
Second best when you do not have a separate ADSL line for the router 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 (Included)
Use an ADSL microfilter with a built-in splitter when there is 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.
Plugs into the ADSL line
Figure 6. Two-line ADSL microfilter with built-in splitter