How to Wire a DSL Jack | Techwalla DSL subscribers may expect a phone company to install appropriate jacks in their household, but this is not a requirement. It's cheaper to do the wiring yourself, and it's not difficult. Phone lines consist of four-strand wires, including two transmit and two receive frequencies.Author: Michael Hintz Centurylink Dsl Wiring Diagram | Free Wiring Diagram Variety of centurylink dsl wiring diagram. A wiring diagram is a streamlined conventional pictorial representation of an electric circuit. It shows the elements of the circuit as streamlined forms, and the power as well as signal connections in between the devices. How To Install a DSL Line DSL stands for Digital Subscriber Line. It's a way of combining traditional audio signals for the voice calls with digital communication for an Internet connection. The telecommunications company enables DSL on your line, and then it's your problem to get the higher frequency digital signals from the company's box into the house and to your computers.