Coax to RJ11 Phone Adapter Converter $15.00 To aid your networking needs Cable Choices Choose an optionAdapter OnlyAdapter With CableClear Coax to RJ11 Phone Adapter Converter quantity Add to cart Sold out for now Add to Quote Continue Shopping Category: Networking Cables & Adapters Description This adapter has a coax on one side and an RJ11 phone line port on the other.