The RJ45 cable, also known as an Ethernet cable, is a standard cable which has four twisted pairs of colors. It is easy to crimp a RJ45 cable and make it into a straight cable or cross the cable as required. To make a straight cable, the ends must be crimped in the same way at each end. When making a crossover cable, some wires of certain colors have to be reversed. Learning how to crimp a RJ45 cable and making straight and cross cables prove to be useful as different types of wires of varied le
What you need?
- A reasonable length FTP cable
- Two RJ45 tips
- A clip crimp
How to proceed?
Strip the cable to 2 cm at each end and separate the strands.
They are usually divided into 4 twisted pairs of colors:
Orange / orange-white Green / green-white Blue / white and blue Brown / brown-white
Making a straight cable
To make a straight cable, the tips must be crimped typically the same way at each end by respecting the twisted pair size.
In general, the code used is:
1) orange-white 2) orange 3) green-white 4) Blue 5) blue-white 6) Green 7) brown-white 8) brown
Making a crossover cable
For a crossover cable, swap 1 with 3, and 2 with 6, in the list above. This gives:
1) green-white 2) green 3) orange and white 4) Blue 5) blue-white 6) orange 7) brown-white 8) brown
The standard EIA / TIA 568 (A & B)
1) white-green / white-green 2) green / green 3) white-orange / white-orange 4) Blue / blue 5) white-blue / white-blue 6) Orange / orange 7) white-brown / white-brown 8) brown / brown
For crossover cable 10/100baseT
1) white-green / white-orange 2) Green / orange 3) white-orange / white-green 4) Blue / blue 5) white-blue / white-blue 6) Orange / green 7) white-brown / white-brown 8) brown / brown
To complete crossover cable or cross gigabit
On Gbic 1000BaseT eg
1) white-green / white-orange 2) Green / orange 3) white-orange / white-green 4) Blue / white-brown 5) white-blue / brown 6) Orange / green 7) white-brown / blue 8) Brown / white-blue
Many Gigabits (10/100/1000 multi speed) are auto MDI / MDIX and automatically adapt to the type of cable connected.
A picture to better understand the coding
- Crimping colour code
- Rj45 crimping color code
- Rj45 crimping colour code
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