What Is Network Cabling

Overview

• What cable types are available?
• How do cables work?
• How are cables used in networking?
• How are connections made?

Learning Objectives

• List common cable types used in networking
• Describe how UTP cables are made
• Explain how UTP cables are used in Ethernet networks
• Demonstrate the ability to make a working patch cable
• Name the two wiring standards used for wired Ethernet networks and their uses

Common network cable types

• Coaxial cable
• Unshielded twisted pair
• Fiber optic

UTP characteristics

• Unshielded
• Twisted (why?) pairs of insulated conductors
• Covered by insulating sheath

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)

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

Making connections - Tools

• Cat5e cable
• RJ45 connectors
• Cable stripper
• Scissors
• Crimping tool

Making connections - Steps

• Strip cable end
• Untwist wire ends
• Arrange wires
• Trim wires to size
• Attach connector
• Check 
• Crimp
• Test

Step 1 – Strip cable end

• Strip 1 – 1½” of insulating sheath
• Avoid cutting into conductor insulation

Step 2 – Untwist wire ends

• Sort wires by insulation colors

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

Step 4 – Trim wires to size

• Trim all wires evenly
• Leave about ½” of wires exposed

Step 5 – Attach connector

• Maintain wire order, left-to-right, with RJ45 tab facing downward

Step 6 - Check

• Do all wires extend to end?
• Is sheath well inside connector?

Step 7 - Crimp

• Squeeze firmly to crimp connecter onto cable end (8P)

Step 8 – Test

• Does the cable work?

Network Cabling.PPT

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