Telephone Wiring Diagram with photos and instructions

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Telephone Wiring Diagram #1

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

telephone wiring diagram-01.jpg	telephone wiring diagram-02.jpg
telephone wiring diagram-03.jpg	telephone wiring diagram-04.jpg
	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.
telephone wiring diagram-05.jpg	telephone wiring diagram-06.jpg
telephone wiring diagram-07.jpg	telephone wiring diagram-08.jpg
	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.
telephone wiring diagram-09.jpg	telephone wiring diagram-10.jpg
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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Testimonials:

Hi Dave,
Wow, thanks for the
detailed response!
Thanks again for such a complete explanation,
I will definitely keep you
in mind for any
other things that might come up that I do not completely understand.

Steve
Orange, MA

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Wiring Diagrams | Energy Savings | Emergency Repairs | Electrical Safety | Electrical Calculations | Site Terms | Site Map

Telephone Wiring Diagram #1

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

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.

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

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.