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Understanding ADSL Microfilters

ADSL technology uses the same wires as your telephone service. However, ADSL adds signals to the telephone lines which create noise in the telephone service. You must use ADSL microfilters to filter out these signals before they reach your telephone.

Note: If you purchased the wireless ADSL modem router in a country where a microfilter is not included, you must acquire one.

ADSL Microfilter

Figure 1-3

Each device such as a telephone, fax machine, answering machine, or caller ID display will require an ADSL microfilter.

Warning: Do not connect the wireless ADSL modem router to the ADSL line through a microfilter unless the microfilter is a combination microfilter/splitter specifically designed for this purpose. Doing so will prevent block your connection to the Internet. If you have any doubts about this, connect the wireless ADSL modem router directly to the ADSL line.

ADSL Microfilter with Built-In Splitter

Figure 1-4

Use an ADSL microfilter with built-in splitter when there is a single wall outlet which must provide connectivity for both the wireless ADSL modem router and telephone equipment.