CableWholesale's Telephone Jack Line Separator, RJ11/RJ12 Male to 3 RJ11/RJ12 Female, Line 1, Line 2, Line 1 and 2 Warranty: Lifetime Connection: RJ11 2-line Male Phone Plug Connection: RJ11 2-line Female Phone Jack Plus 2 RJ11 Single Line Jacks Allows you to plug two phones into one phone jack