You need one for every phone jack you use (even for fax, and answering machines). Please be aware home alarm systems, or certain kinds of emergency assist phone hookups may complicate things and require you to use a splitter instead of microfilters.

Also keep in mind other terminal points, such as your cable/satellite TV decoder.

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by Tom edited by KeysCapt
last modified: 2002-07-22 21:29:42