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 : Electronics
SHONCO in-line DSL Filter RJ11 6P4C Male to 2 Female Telephone Modem ADSL Splitter Filter-2 Pack
Amazon.it: FILTRO ADSL 3
Amazon.com: RJ11 ADSL Filter Splitter Box with Cable DSL and Phone Connections : Electronics
SHONCO in-line DSL Filter RJ11 6P4C Male to 2 Female Telephone Modem ADSL Splitter Filter-2 Pack