Eagle 3 Way Phone Splitter Line Adapter Ivory RJ11 Modular Jack Wall Telephone Tee
Allows you to plug three modular devices into one jack (phone, fax, modem, etc.) If you have two phone lines coming into one wall jack, both will be available to all three. Line 1, line 1, and line 1 or Line one/two, line one/two, and line one/two.