CREATING A 568A, 568B, OR CROSSOVER CABLE

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CREATING A 568A, 568B, OR CROSSOVER
CABLE CreatorDennis Groseclose
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RJ-45 Color Codes
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TROUBLESHOOTING TECHNIQUES
If a user says they cant get on the network, it
must be determined what happened. Troubleshooting
involves asking many questions that will help
pinpoint the cause of the problem. Pertaining to
cables-Is the cable plugged in at both ends? Is
there a light on the Dongle? Was the cable
plugged in before the machine was booted?
Obviously the determination is concerned with
the root of the problem. Is the problem occurring
because of user error, cable failure, or
equipment/software failure. Suspecting the
cable would lead to a visual inspection of the
cable and the end connectors. You would look for
wires that were not pushed far enough into the
RJ45 to make contact, or had crossed. If those
appear to be sound, the next step is using an
electronic tester. If the cable passes then check
the connections the cable plugs into.
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REPAIR TECHNIQUES
The Steps to Rebuilding a CAT 5 Cable 1. Inspect
the cable and determine the problem 2. Cut off
the damaged section 3. Cut away the
sheathing 4. Separate the pairs by colors 5.
Align the wires in the proper pattern 6. Hold
the wires in place between thumb and
forefinger 7. Cut the wires evenly across 8.
Push the wires into the RJ45 9. Inspect the clip
to make sure the wires are fully inserted 10.
Crimp and Test
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REQUIRED TOOLS
Crimp Tool
Punch-Down Tool
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INSPECT THE CABLE
Look at the cable for defects. What you will
usually see with cables undergoing many
insertions will be a broken top clip. This will
prevent the cable from remaining secured in the
jack.
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Cut Off the Unwanted Section
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Cut the Sheathing Back About One Inch
Very carefully cut the blue sheathing back about
0ne inch. Be careful not to cut into the inside
wires. The sheathing can usually be twisted
off if the cut does not separate the pieces. This
is actually preferable to cutting too deeply and
cutting the wires.
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Separate The Wires by Pairs
There are four pairs in the cable. Separate each
pair without separating the individual wires.
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Align the Individual Wires into the 568A Pattern
Align the wires into the 568A pattern. Green-
White Green Orange-White Blue Blue-White Orange Br
own-White Brown
8-BR
7-BRW
6-OR
5-BLW
4-BL
3-ORW
2-GR
1-GRW
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THE 568-B PATTERN
Align the wires into the 568B pattern. Orange-
White Orange Green- White Blue Blue-White Green Br
own-White Brown
8-BR
7-BRW
6-GR
5-BLW
4-BL
3-GW
2-O
1-OW
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Firmly Grip Wires
Hold the wires firmly between the thumb and
forefinger, maintaining the proper pattern.
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Cut The Wires Evenly
Cut the wires evenly across all eight wires
simultaneously while maintaining a firm grip, do
not release the wires. The cut should leave about
3/4 of an inch of wire exposed.
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Insertion into the RJ45
Maintain the firm grip on the wires and slowly
ease the array of wires into the RJ45 clip.The
clip part should be on top and the 1 wire should
be on the left.( Front reference ) Closely
observe to make certain all wires are being
pushed completely to the front of the clip, no
wires are crossed, and the correct pattern is
installed.
1 Wire
TOP of CLIP
FRONT
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Check Cable Wires for Proper Insertion
Check to insure all wires are inserted completely
to the front of the RJ45 connector.
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Crimp the RJ45
Hold the cable and RJ45 while inserting the clip
into a crimping tool. Use a strong and measured
squeeze to make certain the pins are all pushed
down into the wires. Failure to push the
connectors all the way into the wires will result
in a defective cable.