LEARNING ACTIVITY SHEET
SEPCIAL PROGRAM IN ICT 10
COMPUTER SYSTEM SERVICING 10
Second Quarter, Week 7
Name of Learner: ________________________________________ Date:_____________
Grade Level /Section: __________________________
CONFIGURING STRAIGHT-THROUGH ETHERNET CABLE
BACKGROUND INFORMATION FOR LEARNERS
Figure 1. Example of a Straight-through configuration.
Analyze the image above. Are the two (2) computers connected? How? The computers were connected
via Ethernet cable into a switch. This is one example of straight-through cable configuration because computer
and switch are different devices and only a straight-through cable can connect them.
1|Page
A good Ethernet Cable Configuration termination provides a proper wire crimp. Also, important, is
not unwinding the wires more than necessary.
Figure 2. T568 A Straight-through color-coding
Figure 2 identifies on how you will pair the wires by using this color-coding configuration. The color-
coding configuration is as follows:
White Green Paired with Green
White Orange Paired with Blue
White Blue Paired with Orange
2|Page
White Brown Paired with Brown
Figure 3. T568 B color-coding configuration
Figure 3 identifies on how you will pair the wires by using this color-coding configuration. The color-
coding configuration is as follows:
White Orange Paired with Orange
White Green Paired with Blue
White Blue Paired with Green
3|Page
White Brown Paired with Brown
Remember, the color-coding must be done from BOTH ENDS of the cable. Thus, you will need two (2)
pieces of RJ-45 in order for you to make a straight-through cable.
TOOLS AND MATERIALS NEEDED:
1. Crimping tool – is a device used to conjoin two (2) pieces of metal by deforming one or both of them in
a way that causes them to hold each other. The result of the tool’s work is called crimp. In configuring
cable, crimping tool is used to lock/join RJ-45 and UTP cable.
Figure 1. Crimping tool
2. Wire stripper – is a tool designed to remove the protective covering (jacket) off a cable to expose the
inner wires. Since inner wires comes in different shapes, there are dozens of wire strippers available. In
the picture, is an example of a wire stripper that strips cables when placed in-between the blade and the
holder and spun around the cable until the cable jacket can be pulled off.
Figure 2. Wire stripper
3. RJ45 – short for Registered Jack-45. RJ-45 is an 8-pin connection used for Ethernet network adapters.
RJ-45 resembles the RJ-11 or 6-pin connector used with telephones in United States (they are
completely different). This picture is an RJ-45 connector separated from the cable.
4|Page
Figure 3. Registered Jack-45
4. Network cable tester – is a device used to test the strength and connectivity of a particular type of other
wired assemblies. There are different types of cable testers, each able to test specific type of cable or
wire. A cable tester can test whether a cable or wire is set up properly, connected correctly, and the
communication strength between the source and destination.
Figure 4. Network cable tester
5. UTP cable – short for unshielded twisted pair cable. It is the most popular type of network cable which
consists of two (2) unshielded wires twisted around each other. Due to its low cost, UTP cabling is
widely used for local-area networks (LANs) and telephone communications.
Figure 5. UTP cable
PROCEDURES:
1. Strip the cable jacket back one full inch.
2. Untwist the wires back to within 1/8 inch of the jacket.
3. Arrange the wires in the order in which you want to crimp them. (T568 B each end)
5|Page
4. Grasp the wires firmly, between your thumb and forefinger, flatten them, and even wiggle them a bit to
take out the curliness.
5. Concentrate your efforts on the bottom ½ inch. The wires must lay flat and together, aligned as close as
possible.
6. While holding the wires firmly, cut off the wires ½ inch from the cables jacket. Cut the wires with some
sharp wire strippers or even crimping tool. Avoid wire cutters that flatten the ends of the wires insulating
material. (this makes inserting the wires very difficult)
7. Insert the wires into RJ-45. Make sure that the wires stay LINED-UP. The wires should reach the end of
the little tube they are in.
8. The covering or jacket should even with the end of the first indent (Small bump line on the lower part of
RJ-45). This must be done because it’s a strain relief for the cable.
9. Insert it into the crimping tool, and CRIMP IT. You cannot un-crimp once you crimp RJ-45 to UTP
cable.
10. Use the network cable tester to test the Ethernet cable. If all the lights blink, it’s a good network cable.
But if one or more lights do not blink, cut the RJ-45 out because once you crimp it, you cannot use that
RJ-45 anymore.
(For better understanding, watch the video on how to configure straight-through cable. Link is in the reference)
Figure 6. Straight-through Ethernet cable
(The image above is how it looks like after you are done configuring a straight-through Ethernet cable)
IMPORTANT NOTES:
A straight-through cable has an IDENTICAL END.
Straight-trough is used as a patch cord in Ethernet connections, and in connecting two (2) different
components. (e.g. computer to router)
Looking at the RJ-45 with the clip facing away from you. (or the tail facing downward)
Brown is always on the right, and pin 1 (white orange) is on the left.
No more than ½ inch of the Ethernet cable should be untwisted. Otherwise it will be susceptible to
crosstalk.
Do not deform, do not bend, do not stretch, do not staple, do not run parallel with power cables, and do
not run Ethernet cables near noise inducing components.
6|Page
LEARNING COMPETENCY
Make a straight-through Ethernet cable.
ACTIVITIES
ACTIVITY 1
Direction: Answer the following questions briefly.
1. Is it commendable to use the color-coding T568 A in one end and T568 B on the other end in doing
a straight-through cable? Explain your answer.
____________________________________________________________________________________
__________________________________________________________________________
2. Why do you need to align the jacket of the cable into the first indent?
____________________________________________________________________________________
__________________________________________________________________________
3. What would you do if all lights do not blink after you crimp RJ-45 and cable together?
____________________________________________________________________________________
__________________________________________________________________________
ACTIVITY 2
Direction: Complete the table.
T568 B color-coding configuration
Paired with
7|Page
Paired with
Paired with
Paired with
T568 A color-coding configuration
Paired with
Paired with
Paired with
Paired with
REFERENCES
https://totalcommstraining.com/what-is-network-cabling/
https://fossbytes.com/networking-devices-and-hardware-types/
https://www.youtube.com/watch?v=VFaAJpV19f0
http://www.cables-solutions.com/difference-between-straight-through-and-crossover-cable.html
Prepared by: JEROME JOHN J. BAUTO
Name of Writers
Noted by: LABERNE A. LADIGNON, JR
Division ICT Coordinator/ OIC EPS
8|Page
KEY TO CORRECTIONS
Activity 2
First table
White orange – orange
White green – blue
White blue – green
White brown – brown
Second table
White green – green
White orange – blue
White blue – orange
White brown – brown
9|Page
