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Telephone Wiring Diagram #1 electrical wiring photos

By Dave Rongey
©2008 Dave Rongey

Summary: This telephone wiring diagram will show you the direct steps to correctly wiring a telephone jack. Disconnect the main phone line before wiring phone jacks to avoid shock.

 
Wiring a Telephone Jack

After installing the Cat 3 - 3 pair phone wire I am ready to install the wall jack.

You will have a wide variety of telephone jacks to choose from but the wiring for a single line phone service will be standard.

telephone jack wiring

 

This telephone wiring diagram shows the standard of wiring telephone jacks.

The single line set will use the following pairs depending on your cable:
Red - Green
White Blue - Blue/White


[click for larger image]

Quick Fix Tip:
After you connect your pair to the jack and you get a Dial Tone but you do not hear tones
when you dial a number from a button pad then just reverse the pair.



Installing a Telephone Wall Jack
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Most wall phone jacks come configured

for a 2-line cord even thought a 1-line phone will
work just fine.
You are probably wondering why the extra pairs?
Well they will be used if you ever decide to add
another phone line or if for some reason the
primary pair stops working, then one of the
spare pairs
can be used.
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Two Lines from one Telephone Jack
This style of phone jack can be pre-wired for or a 2-line phone service giving you the opportunity to have a second phone number that can be used for a business line or a fax machine.

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Make sure the wires are well under the screw terminals. If you plan to use a cordless phone its always a good idea to install your phone jack wiring beside an existing wall receptacle which will be available for a low voltage transformer which may be required.
 

 

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