C2G/Cables to Go 01922 RJ11 4-pin Modular T-Adapter (Ivory) Connector 1: One RJ11 Male and Connector 2: Two RJ11 Female Connect a phone and a fax to one plug If you need to connect two devices to one phone jack, this adapter will make the right connection. Great for connecting a phone and fax machine to the same plug. Use for data/voice applications. Lifetime Warranty