Tgomtech In-line DSL Filter with Splitter Separates the ADSL signal from the voice signals on a telephone line One RJ11 at one end for telephone line; two RJ11s at the other end for phone/fax and ADSL modem Protects the voice signal and ADSL digital signal from the interference of a telephone and a fax machine DSL splitter splits the incoming signal to provide separate outputs for filtered voice (phone) and ADSL (data), eliminating any impedance's that interfere with communications.