RJ-45 connector. It allows you to plug your cable into a wall jack or the
network port of a network device like a computer.
Each wire in the cable goes into a slot inside the RJ-45 connector, and
this connects it to a pin in the connector.
So which wire goes where?
The position of each wire is important.
When you plug an RJ-45 connector into a jack, the pins on the
connector make contact with pins in the jack. If the wires are in the
correct position, this allows information, in the form of electrons, to
flow. If the wires are in the wrong position, the information won’t be
able to get through.
The order of the wires in an RJ-45 connector conforms to one of two
standards. These standards are 568A and 568B.
568A and 568B are cabling standards that tell you which order your wires
need to go in when fitting an RJ-45 cable.
- The 568A wire order
If you’re following the 568A wiring standard, you use the following wire order:
Striped green, solid green, striped orange, solid blue, striped blue, solid orange,striped brown, solid brown. - The 568B wire order
If you’re following the 568B wiring standard, you use the following wire order instead:
Striped orange, solid orange, striped green, solid blue, striped blue, solid green, striped brown, solid brown.
The 568B wire order is like the 568A wire order but with the position of
the green and orange wires switched around.
Can you see any similarities between the 568A and 568B wire orders? The
order for each standard is basically the same except the orange and green
wires are switched over.
So which standard should you use?
When you attach an RJ-45 connector, the key thing is that both ends of
the cable use the same standard. Before fitting a new RJ-45 connector, take
a look at the other end of the cable. If the other end of the cable uses
standard 568A for the RJ-45 wire order, then fit your new RJ-45 connector
using the 568A standard. If it uses 568B, then use this standard instead.
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