How to Add a Phone Extension

Back of phone wall jack.
Back of phone wall jack with phone line attached.

Can you run an extension line off an already in use phone jack to a room which may not have one? – Robert

Hi Robert,

It’s not hard to extend a line from an existing phone jack to a new one in another room.

Simply unscrew the existing jack from the wall, and attach the color-coded wires for the new cable to the matching terminals.

Then run the cable to the new jack and attach the matching wires to it.

For more information about working on phone lines, check out our articles on: