RJ45 to RJ11 Adapter,Ethernet to Phone Line Adapter, Phone Line to Ethernet Adapter RJ45 8P8C Female to RJ11 6P4C Male Converter Adapter Cable - Walmart.com
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