Amazon.com: THE CIMPLE CO 2 Wire, 1 Line DSL Filter, with Built in Splitter - for Removing Noise and Other Problems from DSL Related Phone Lines : Automotive
Amazon.com: Suttle 630LCCU-50 1-Line Wall Mount Adapter DSL Filter (Pins 3&4) with Auxiliary Unfiltered Jack, Ivory, Compatible with ADSL and ADSL2+, 2-pole Low Pass Filter Topology : Electronics
BT ADSL filter mf50 EUC | eBay
Amazon.com: THE CIMPLE CO 2 Wire, 1 Line DSL Filter, with Built in Splitter - for Removing Noise and Other Problems from DSL Related Phone Lines : Automotive