Step 1: Locate the wall socket
Locate the telephone wall socket in your home
Find the telephone wall socket in your home. These are most commonly found in the main living area or bedrooms, but can sometimes be in the kitchen. Make a note of all sockets, even those in less convenient locations.
If your home has an older style wall socket (typically a yellow square plug with three prongs), you’ll need a Jackson adapter to plug in a modern RJ11 phone cable. These adapters are available at most electronics or computer stores.