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ADSL Microfilters

If this is the first time you have cabled a wireless router between an ADSL 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 

on page 20.

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.

Often the ADSL microfilter is included in the box with the wireless 

modem router. If you purchased the wireless 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 wireless modem router plugs directly into a separate ADSL line. Plugging 
the wireless 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 ADSL line

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.