... frequency ADSL) from the signals for the phone & fax (lower-frequency POTS). Each phone or connection in the house ... outlet cable, and connect the 'phone' and 'modem' jacks to your phone or fax line, and to ... will need to install a filter on each phone in the house to prevent line noise. ... devices and accessory products. DSL splitter products include application for MDF and CPE ADSL, ADSL 2 +, VDSL, ...