Separates the ADSL signal from the voice signals on a telephone lineOne RJ11 at one end for telephone line; two RJ11s at the other end for phone/fax and ADSL modemProtects the voice signal and ADSL digital signal from the interference of a telephone and a fax machineFunctionality that is Unbeatable.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.in-line DSL filter with splitter- The In-line Adapter connects between the wall jack and voice device (e.g. phone, fax, answering machine, Caller ID) providing both an unfiltered DSL jack for DSL connection and a filtered jack for a single line of voice device communications- Eliminates all erratic impedance from telephone equipment that interfere with DSL communications- FCC Registered; Complies with Part 68- ANSI T1. 421- Materialis flame retardant thermoplastic compliant with UL 94V-0- Minimum 50 micro-inch of gold and nickel- Small compact design- Customer installableSE900LCCS50