Network Cabling
Making connections with Cat5
Way cool!
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 1
Computer Sciences, UNILAG
Common network cable types
⚫ Coaxial cable
⚫ Twisted pair
⚫ Fiber optic
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 2
Computer Sciences, UNILAG
Cables and Connectors
Today Yesterday Tomorrow
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 3
Computer Sciences, UNILAG
Twisted Pair
⚫ Primarily developed for computer networks.
⚫ Known as Ethernet cable
⚫ Consists of 4 color-coded pairs of insulated copper wires.
⚫ There are four pairs. Each pair has one solid color and one
stripped color wire.
⚫ There are two types of twisted-pair cable, based on how
pairs are stripped in the plastic sheath,;
UTP and STP.
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 4
Computer Sciences, UNILAG
Unshielded twisted-pair and Shielded twisted-pair
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 5
Computer Sciences, UNILAG
UTP categories
Category 1 Voice only (Telephone)
Category 2 Data to 4 Mbps (Localtalk)
Category 3 Data to 10Mbps (Ethernet)
Category 4 Data to 20Mbps (Token ring)
Category 5 Data to 100Mbps (Fast Ethernet)
Category 5e Data to 1000Mbps (Gigabit Ethernet)
Category 6 Data to 2500Mbps (Gigabit Ethernet)
Monday, February 5, 2024 Prepared by: Technical Unit, Department of
6
Computer Sciences, UNILAG
Cat5e cable
⚫ 1000Mbps data capacity
⚫ For runs of up to 90 meters
⚫ Solid core cable ideal for structural
installations (PVC or Plenum)
⚫ Stranded cable ideal for patch cables
⚫ Terminated with RJ-45 connectors
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 7
Computer Sciences, UNILAG
Making connections - Tools
⚫ Cat5e cable
⚫ RJ45 connectors
⚫ Cable stripper
⚫ Scissors
⚫ Crimping tool
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 8
Computer Sciences, UNILAG
Making connections - Steps
1. Strip cable end
2. Untwist wire ends
3. Arrange wires
4. Trim wires to size
5. Attach connector
6. Check
7. Crimp
8. Test
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 9
Computer Sciences, UNILAG
Step 1 – Strip cable end
⚫ Strip 1 – 1½” of insulating sheath
⚫ Avoid cutting into conductor insulation
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 10
Computer Sciences, UNILAG
Step 2 – Untwist wire ends
⚫ Sort wires by insulation colors
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 11
Computer Sciences, UNILAG
Step 3 – Arrange wires
⚫ TIA/EIA 568A: GW-G OW-Bl BlW-O BrW-Br
⚫ TIA/EIA 568B: OW-O GW-Bl BlW-G BrW-Br
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 12
Computer Sciences, UNILAG
RJ45 connector
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 13
Computer Sciences, UNILAG
TIA/EIA 568 STANDARD CABLE TERMINATION
Two standards on plugs and jacks
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 14
Computer Sciences, UNILAG
Construct and Terminate Twisted Pair Cables
⚫ How to terminate UTP cables
Crossover cable: A – B
Straight-through cable: B – B
(in Europe)
Straight-through cable: A – A
(in America)
Remember: A for America
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 15
Computer Sciences, UNILAG
Construct and Terminate Twisted Pair Cables
⚫ Cross-over and straight through cables
Like devices: Crossover cable
PC PC
Switch Switch
Unlike devices: Straight-through cable
Switch PC
16
Prepared by: Technical Unit, Department of
Monday, February 5, 2024
Computer Sciences, UNILAG
Step 4 – Trim wires to size
⚫ Trim all wires evenly
⚫ Leave about ½” of wires exposed
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 17
Computer Sciences, UNILAG
Step 5 – Attach connector
⚫ Maintain wire order,
left-to-right, with RJ45
tab facing downward
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 18
Computer Sciences, UNILAG
Step 6 - Check
⚫ Do all wires extend to end?
⚫ Is sheath well inside connector?
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 19
Computer Sciences, UNILAG
Step 7 - Crimp
⚫ Squeeze firmly to crimp connecter
onto cable end (8P)
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 20
Computer Sciences, UNILAG
Step 8 – Test
⚫ Does the cable work?
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 21
Computer Sciences, UNILAG
Let’s go to work!
Monday, February 5, 2024 Prepared by: Technical Unit, Department of 22
Computer Sciences, UNILAG
