RCA Red Wire Splice Connector Phone Cord Coupler (10-Pack) - Gillman Home Center
1M RJ11 to RJ45 Cable Phone Telephone Cord RJ11 6P4C to RJ45 8P8C Connector Plug | eBay
Curly phone cord and RJ11 4 wire 5m - Cablematic
Amazon.com: RFAdapter Short Phone Cord, 2 Pack 12 inch RJ11 6P4C Male to Male Telephone Landline Extension Cable Line Wire Connector for Landline Telephone, Modem, Fax Machine, White : Electronics
RJ45 to RJ11 Cable, 6 Feet Phone Jack to Ethernet Adapter RFAdapter RJ11 6P4C Male to RJ45 8P8C Male Connector Plug Cord for Landline Telephone - Walmart.com