Newhouse Hardware 15 ft. Telephone Extension Cord, with RJ11 (6P4C) Connectors, Works w/Telephones, Fax Machines, Modems, White (5-Pack) BC15-WH-05 - The Home Depot
10m RJ11 to RJ45 Cable RJ11 to RJ45 Cable Phone Telephone Cord RJ11 6P4C to RJ45 8P8C Connector Plug Cable for Landline - Walmart.com