Zenith 50 ft. 4-Wire Telephone Line Cord in White TL1050W - The Home Depot
Amazon.com: RetailAndBulk 1FT RJ11 Telephone Cord - Pro Grade Landline Phone Cable, 4 Wire, 100% Copper, Thickest Gold Contacts, Heavy Duty PVC Jacket (Straight, 1 Foot, Black) Made in USA : Electronics
Phone Jack Wiring
Amazon.com: 100' FT Flat Phone Cord Cable Wire 4 Conductor 4C Modular RJ11 Line Audio Data Signal Telephone Jack Line RJ-11 Hook-Up Extension, Silver Satin, Bulk Roll with No Connectors : Electronics