Chatty teenagers or a fax line are just two of the many reasons homeowners install a second phone line in their home. Fortunately, you can usually install two separate phone lines from your existing wiring if you already have relatively modern telephone wiring.
Before we get started, you must know what you’re getting into. While adding phone lines is not as dangerous as many other electrical projects, you could feel a jolt of electricity if the phone rings while holding the wires. Before you do anything, go outside to the phone service box, open the right-hand side and disconnect line one and line two.
How to Add A Second Phone Line
With safety out of the way, we can get down to business. Remove the cover on the phone jack in your house and look at the wires. All telephone cables should contain at least four wires: red, green, black, and yellow. Luckily, only the red and green ones are typically used to connect your primary phone. This leaves the black and yellow wires to power a second line.
The wires in the jack are probably already connected.