How to Add a Phone Extension
Ask Danny, Electrical and Lighting, Repairs and Installation by Danny Lipford
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:
5 Comments on “How to Add a Phone Extension”
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December 31st, 2008 at 15:28
I tried the above method of running a cable from an existing jack to a room that has no jack but my internet failed. My intent is to have the existing jack still function (work) while I run a wire to a room that has no jack. Any recommendations?
January 10th, 2009 at 21:24
My network interface had a small grounding wire going to a cold water pipe. I think it was connected to the yellow (unused) terminal. However, in everything I read online or on paper about wiring makes no mention of a grounding wire.
What do you think?
January 27th, 2009 at 15:21
HI IAM ADDING A NEW PHONE AT&T CAME HOOK UP YHE LINE OUT SIDE. I HAVE HOOK THE BLACK WIRE TO THE BLACK AND YELLOW TO YELLOW I AM NOT GETTING A DIALTONE DO I NEED A TEASTER GIL PAREISA
December 13th, 2009 at 15:34
which colour wire is the ringer
March 11th, 2010 at 07:28
I am eliminating my business line in adjacent room, but would like to use the phone jack/extension in our bedroom to keep the internet service associated with the computer in the adjacent room.
Do I merely take the black & yellow lines associated with the business line and combine them with the red & green lines for the home phone? And, if so, do I put the black line under the red; and, the yellow under the green?