Installerparts RJ11 6P4C Line Splitter - Line1/Line2/Line1+Line2 &ndash; White Use the Line In Splitter to Divide Lines into 3 Separate Outlets (L1, L2, and L1 + L2) Plug up to 3 Modular Devices into One Jack The Ethernet Line Splitter is Compatible with Devices such as Phones, Fax Machine, Modem, and More Available in a White Casing