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Aim / Objective

To design and crimp an unshielded twisted pair (UTP Cat6) Ethernet LAN cable using an RJ45 modular plug and ratcheting crimping tool according to TIA/EIA-568A and T568B standards, verify continuity with a LAN cable tester, connect a PC to a switch/router to establish LAN and Internet connectivity, and study core networking devices.

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Hardware & Software Requirements

Hardware Components

✓ Cat6 UTP (Unshielded Twisted Pair) 4-pair 8-conductor Solid Copper Cable (2 meters per student)
✓ RJ-45 Modular Connectors (8P8C plugs with gold-plated pins) and rubber snagless boots
✓ Professional RJ-45 Ratchet Crimping Tool with stripping and cutting blades
✓ UTP Cable Wire Stripper / Punch-down cutter
✓ Digital RJ-45 Master & Remote LED Network Cable Tester
✓ Networking Devices Demonstration Bench: 8-Port Gigabit Switch, Wi-Fi Router, Optical Fiber Patch Cord (SC/LC), SFP Transceiver, Optical Network Terminal (ONT)

Software, OS & Tools

✓ Windows / Linux OS on student PC
✓ Web Browser to access Router Web Management GUI (`http://192.168.1.1` or `192.168.0.1`)
✓ Command Line Network Tools (`ping`, `tracert`, `ipconfig /all`)

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Teacher's Lab Delivery Guide

Essential briefing notes, pedagogy, and setup tips for lab instructors

Faculty Exclusive

⏱ 5-Minute Pre-Lab Lecture Briefing:

The T568B color code is the golden standard across modern enterprise and home networks. Teach the mnemonic rhyme for T568B: "Orange-White, Orange, Green-White, Blue, Blue-White, Green, Brown-White, Brown". Explain that Gigabit Ethernet uses ALL 4 pairs (8 wires) bidirectionally, unlike 100Mbps Fast Ethernet which only used pins 1, 2, 3, and 6. Therefore, all 8 pins MUST make solid contact.

📝 Key Concepts to Write on Whiteboard:

UTP Cat5e vs Cat6 vs Cat6a bandwidth and twist rate shielding
TIA/EIA-568A vs TIA/EIA-568B wiring standards
Straight-Through Cable (same standard on both ends: PC to Switch/Router)
Crossover Cable (T568A on one end, T568B on other end: PC to PC, Router to Router - largely made automatic by Auto-MDIX)
Networking Hardware Taxonomy: Hub (Layer 1 broadcast), Switch (Layer 2 MAC learning), Router (Layer 3 IP routing), Optical Fiber ONT (Layer 1 photonics)
Using RJ45 Master/Remote Tester sequential LEDs (1 through 8) to detect opens, shorts, and miswires

⚙ Pre-Class Lab Setup:

Distribute safety goggles when cutting copper wire snippets. Provide extra RJ45 plugs as beginners frequently cut wires too long or miss a pin.

⚠ Common Student Pitfalls & Fixes:

Students untwist too much cable jacket (>0.5 inch), causing signal crosstalk and failing the crimp because the cable outer jacket is not clamped under the plastic strain relief wedge.

🛡 Lab Safety & ESD Precautions:

Never leave cut copper wire ends on the floor—they easily penetrate footwear and damage shoes. Avoid looking into active fiber optic cables (invisible laser radiation can cause blindness).

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Step-by-Step Practical Procedure

1

Strip the Outer Cable Jacket

Slide the rubber protective boot onto the Cat6 cable first. Use the cable stripper to score and remove approximately 1.5 inches (3.5 cm) of the outer PVC jacket, taking care not to nick the inner copper wire insulation. Remove the plastic spine/spline separator.

Command / Action:

Tool: UTP Rotary Cable Stripper

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Teacher Note / Pro-Tip: Do not cut too deeply with the stripper; rotate lightly once or twice.

2

Untwist, Straighten, and Arrange Wires (T568B Standard)

Untwist the 4 pairs. Straighten each individual conductor using your fingers. Arrange the 8 wires flat in exact T568B order from left to right: 1: White-Orange, 2: Orange, 3: White-Green, 4: Blue, 5: White-Blue, 6: Green, 7: White-Brown, 8: Brown.

Command / Action:

Sequence: W-O | O | W-G | B | W-B | G | W-BR | BR

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Teacher Note / Pro-Tip: Ensure pins 4 (Blue) and 5 (White-Blue) sit between Green-White (3) and Green (6).

3

Trim Wires to Flush Length (1/2 Inch)

Hold the aligned wires tightly side-by-side between thumb and index finger. Using the flat cutting blade of the crimper, trim the wires in a clean, perfectly straight line so that approximately 12 mm (0.5 inch) of exposed parallel conductors remain.

Command / Action:

Measurement: Cut straight across at 0.5 inch (12 mm)

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Teacher Note / Pro-Tip: Cutting at an angle will cause some wires not to reach the end contacts.

4

Insert Wires into RJ45 Plug and Verify Seating

Hold the RJ45 plug with the gold pins facing UP and the plastic release latch facing DOWN. Push the wires firmly into the plug channels until all 8 wire tips are clearly visible touching the front plastic face. Ensure the outer jacket enters past the strain relief wedge.

Command / Action:

Visual Check: Inspect front face and side pins before crimping

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Teacher Note / Pro-Tip: The outer jacket must extend inside the connector body so the crimper crimps the jacket, not bare wires.

5

Crimp the RJ45 Plug with Crimping Tool

Insert the prepared RJ45 connector into the 8P8C crimping chamber of the tool. Squeeze the ratchet handles with steady, firm pressure until the ratchet releases. The gold-plated pins pierce the wire insulation and the strain-relief clamp locks down on the jacket.

Command / Action:

Action: Full ratchet squeeze until tool releases

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Teacher Note / Pro-Tip: Slide the rubber boot over the connector body.

6

Repeat on Opposite End & Test with Cable Tester

Crimp the other end of the cable using the same T568B sequence to create a Straight-Through patch cord. Plug one end into the Master unit of the cable tester and the other into the Remote unit. Turn on the tester and verify that LEDs 1 through 8 light up sequentially on both units.

Command / Action:

Tester Verification: LEDs 1-2-3-4-5-6-7-8 must illuminate in synchrony

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Teacher Note / Pro-Tip: If any LED skips, stays dark, or lights out of order, the cable has an open wire or crossed pin.

7

Connect PC to Switch/Router & Verify Link

Connect one end of your completed cable into the PC Ethernet NIC and the other into a LAN port on the Gigabit Switch or Router. Observe the hardware link LED turn green. Check IP assignment via DHCP and ping the router gateway.

Command / Action:

CLI: ipconfig /all && ping 192.168.1.1

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Teacher Note / Pro-Tip: Open a browser and navigate to the default gateway IP to view the router administration portal.

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Interactive Hands-On Lab Simulator

Practice and test concepts virtually before or after performing on physical lab equipment

Live Interactive

Loading simulator...

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Observations & Student Lab Record

Students are required to record the following measured parameters, hardware specifications, and output status into their physical lab journals:

Cable Pin Number	T568B Wire Color	T568A Wire Color	Gigabit Ethernet Signal Role (1000BASE-T)
Pin 1	White-Orange	White-Green	Transmit / Receive Pair A (+) (DA+)
Pin 2	Orange	Green	Transmit / Receive Pair A (-) (DA-)
Pin 3	White-Green	White-Orange	Transmit / Receive Pair B (+) (DB+)
Pin 4	Blue	Blue	Transmit / Receive Pair C (+) (DC+)
Pin 5	White-Blue	White-Blue	Transmit / Receive Pair C (-) (DC-)
Pin 6	Green	Orange	Transmit / Receive Pair B (-) (DB-)
Pin 7	White-Brown	White-Brown	Transmit / Receive Pair D (+) (DD+)
Pin 8	Brown	Brown	Transmit / Receive Pair D (-) (DD-)

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Conclusions & Learning Outcome

A Cat6 UTP Ethernet cable was successfully assembled and crimped using the TIA/EIA-568B standard on both ends. Complete pin continuity from Pin 1 to Pin 8 was verified with the digital cable tester. Connecting the cable between the PC and the Gigabit switch established a 1000 Mbps full-duplex physical link, and the PC obtained a valid IP via DHCP, confirming internet access.

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Oral Exam & Viva Questions with Answers

Essential questions asked by external examiners and lab evaluators (Accordion UI)

Answer:

Pin 1: White-Orange, Pin 2: Orange, Pin 3: White-Green, Pin 4: Blue, Pin 5: White-Blue, Pin 6: Green, Pin 7: White-Brown, Pin 8: Brown.