Amazon.com: RJ45 to RJ11 Converter Adapter, 2-Pack Telephone RJ11 6P4C Female to RJ45 Ethernet 8P8C Male Cable Cord : Electronics
Amazon.com: Xsusmdom [2-Pack] Phone Jack to Ethernet Adapter, Ethernet to Phone Line Adapter RJ45 Female to RJ11 Male Converter Adapter Cable for Landline Telephone Service : Electronics