Intellinet Networks Adsl Modem Splitter/Adapter (201124) Separates The Adsl Signal From The Voice Signals On A Telephone Line Protects The Voice Signal & Adsl Digital Signal From The Interference Of A Telephone & A Fax Machine One Rj11 At One End For Telephone Line Two Rj11s At The Other End For Phone/fax & Adsl Modem