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Telephone Jack Wiring Color Code Diagram for Tip and Ring

Close Shot of the Rear of a Standard American Telephone Jack Showing the Red and Green Tip and Ring Connections
 
"Tip +" Refers to that side of a two wire telephone circuit which is connected to the positive side of a battery at the telephone company central office.
"Ring -" Refers to that side of a two wire telephone circuit which is connected to the negative side of a battery at the telephone company central office.
 
Modular Telephone Jack With an Attached White Wall Plate
The front of the telephone jack
 
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Blue Pair Twisted Telephone Wires Connected To The Telephone Jack for Tip and Ring
 
The blue pair is connected as the primary telephone line.  The solid blue wire is the Ring and gets connected to the red jack terminal.  The white wire with a blue stripe is terminated on the green Tip screw.
 
 
Tip +
Ring -
Green
Red
 
Black
Yellow
Pair 1 White with blue stripe Blue
Pair 2 White with orange stripe Orange
Pair 3 White with green stripe Green
Pair 4 White with brown stripe Brown
 
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Orange Pair Being Used for Tip and Ring as the Primary Telephone Line
 
Here the orange pair is connected as the primary telephone line.  The solid orange wire is the Ring and is connected to the red jack terminal.  The white wire with an orange stripe is terminated on the green Tip; screw.
 
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The Rear of an American Telephone Jack with Orange and Blue Pairs Connected to Tip and Ring for Two Phone Lines
 
The blue pair and the orange pair are both connected to the tip and ring terminals on this telephone jack.  A splitter plugged into the jack will enable the use of two separate telephone lines.  The solid blue wire is the Ring and gets connected to the red jack terminal.  The white wire with a blue stripe is terminated on the green Tip screw. The solid orange wire is the Ring and is connected to the yellow jack screw.  The white wire with an orange stripe is terminated on the black Tip screw.
 
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Close Shot of a Plug-in Telephone Jack Splitter Plugged into an American Telephone Jack
 
 
A Telephone Jack Splitter enables two lines to be used from one wall jack.
 
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Stripped Cat 5e Four Twisted Pair Unshielded Telephone Wire
 
Cat 5e twisted four pair unshielded telephone wire
 
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Updated July 2, 2018

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