a. Determine the length of cable required. This could be from a hub to a hub, hub to switch, switch to
switch, computer to router, or from one computer to another computer. Add at least 30.48 cm (12 in.)
to the distance. Which length of cable did you choose and why did you choose this length?
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Answers will vary
b. Cut a piece of cable to the desired length and, using wire strippers, remove 5.08 cm (2 in.) of the
cable jacket from both ends of the cable.
Step 2: Prepare and insert the T568A wires
a. Locate the T568A table at the beginning of the lab.
b. Spread the cable pairs and arrange them roughly in the desired order based on the T568A standard.
c. Untwist a short length of the pairs and arrange them in the exact order needed by the standard. It is
very important to untwist as little as possible. Twists are important because they provide noise
cancellation.
d. Straighten and flatten the wires between your thumb and forefinger.
e. Ensure the cable wires are in the correct order based on the standard.
f. Cut the cable in a straight line to within 1.25 to 1.9 cm (1/2 to 3/4 in.) from the edge of the cable
jacket. If it is longer than this, the cable will be susceptible to crosstalk (the interference of bits from
one wire with an adjacent wire).
g. The tang (the prong that sticks out from the RJ-45 connector) should be on the underside pointing
downward when inserting the wires. Insert the wires firmly into the RJ-45 connector until all wires are
pushed as far as possible into the connector.
Step 3: Inspect, crimp, and re-inspect
a. Visually inspect the cable and ensure the right color codes are connected to the correct pin numbers.
b. Visually inspect the end of the connector. The eight wires should be pressed firmly against the RJ-45
connector. Some of the cable jacket should be inside the first portion of the connector. This provides
for cable strain relief which can eventually cause the cable to fail.
c. If everything is correctly aligned and inserted properly, place the RJ-45 connector and cable into the
crimper. The crimper will push two plungers down on the RJ-45 connector.
d. Visually re-inspect the connector. If improperly installed, cut the end off and repeat the process.
Step 4: Terminate the T568B cable end
a. On the other end, use the previously described steps (but use the T568B table and standard) to
attach an RJ-45 connector to the cable.
b. Visually re-inspect the connector. If improperly installed, cut the end off and repeat the process.
c. Which standard [T568A | T568B] would you rather use at home if you have or would like to have a
home network? Student dependent
Step 5: Test the cable
a. Using a cable tester, test the crossover cable for functionality. If it fails, repeat the lab.
b. Use the cable to connect two PCs.
c. On both computers, click the Start button and select Run.
NOTE: If the Run command is unavailable on your PC, visually check the LED status lights on the
NIC card. If they are on (usually green or amber) the cable is functional.
d. On both computers, type cmd and press Enter.
e. On both computers from the command prompt, type ipconfig.
f. Write the IP address of both computers.
Computer 1: _________________________ Machine dependent
Computer 2: _________________________ Machine dependent
g. From the command prompt of one computer, type ping followed by the IP address of the other
computer. If the cable is functional, the ping should be successful. Do the ping on the other computer
as well.
NOTE: The Windows Firewall on the target computer must be temporarily disabled for the ping to be
successful. Refer to Lab 3.1.5 if you need help with this. If you disable the firewall, be sure to reenable
it.
Step 6: Reflection
a. Which part of making these cables did you find the most difficult? Compare your views with a
classmate.
Student’s opinion
b. Are all four pairs of cables twisted the same amount? Discuss the reasons why or why not.
The twisting of the pairs is done to cancel electromagnet interference. The twisting ratio is different for
each cable pair so that they do not fit closely together. If they did fit snugly together it would not help
the EMI cancellation feature as much.
c. Ask a local business or check a site such as http://www.workopolis.com/ to see how much a
beginning cable installer earns and which criteria they look for in a cable installer. Write the
information you discover in the space provided.
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d. Many technicians keep a crossover cable in their toolkit. When do you think that you would use a
crossover cable and when do you think a network technician would use this cable?
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Student’s opinion
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