How phone-line filters are used DSL customers will need one filter for each telephone wall jack in use in order to make sure the telephone and DSL do not interfere with one another. All telephone devices will be completely isolated from the ADSL frequency spectrum. The 2Wire DSL Phone-line Filter is installed between a telephone wall jack and various home telephone devices such as telephones, fax machines, answering machines, and analog computer modems. Copyright 1999 Interlink America. All Rights Reserved.
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