This document discusses different types of network cabling. It describes the three main types as twisted pair, coaxial, and fiber optic cables. Twisted pair cable, especially unshielded twisted pair (UTP), is most commonly used for local area networks. UTP cables are categorized based on their bandwidth and transmission speed capabilities. The document also covers topics such as cable connectors, color coding, straight-through and crossover cables, and guidelines for installing network cabling.

1. Network Cabling

2.  Cable is the medium through which information usually moves
from one network device to another.
Network Cable
 There three common types of cables .
 Coaxial cable
 Fiber optic
 Twisted pair

3.  Twisted pair cable comes in two varieties
1. Unshielded Twisted Pair (UTP) Cable
2. Shielded Twisted Pair (STP) Cable
 Unshielded twisted pair (UTP) is the most popular and is
generally the best option for LAN networks.
 The cable has four pairs of wires inside the jacket.
 RJ-45 (RJ stands for Registered Jack) is the standard
connector for unshielded twisted pair cabling.

4. 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
Category 5e
Data to 100Mbps (Fast Ethernet)
Data to 1000Mbps (Gigabit Ethernet)
Category 6 Data to 2500Mbps (Gigabit Ethernet)

5. Cable Type
Maximum Data
Transmission
Speed
Maximum
Bandwidth
Category 3 UTP 10 Mbps 16 MHz
Category 5 UTP 10/100 Mbps 100 MHz
Category 5 e UTP 1000 Mbps 100 MHz
Category 6 UTP or STP 1000 Mbps 250 MHz
Category 6 a STP 10,000 Mbps 500 MHz
Category 7 STP 10,000 Mbps 600 MHz
UTP categories

6. Cat5e cable
 1000Mbps data transmission capacity
 Runs up to 90 meters
 Terminated with RJ-45 connectors

7. Cabling / Wiring / Color Coding
 There are generally three main types of cabling in
computer networking.
 Out of the 8 pins that exist on both ends of an Ethernet
cable, each pin connects to the same pin on the opposite
side.
 Straight-Through wired cables are most commonly used
to connect a host to client.
1. Straight-through cables

8.  Use a straight-through cable when:
1. Connecting a router to a hub
2. Connecting a compute to a switch
3. Connecting a LAN port to a switch, hub, or computer

9. Connector A
•Pin 1
•Pin 2
•Pin 3
•Pin 4
•Pin 5
•Pin 6
•Pin 7
•Pin 8
Connector B
•Pin 1
•Pin 2
•Pin 3
•Pin 4
•Pin 5
•Pin 6
•Pin 7
•Pin 8
Color Coding

10.  Crossover cables are very similar to straight-through
cables, except that they have pairs of wires that crisscross.
 This allows for two devices to communicate at the same
time.
 Unlike straight-through cables, we use crossover cables
to connect like devices.
2. Crossover cables cables

11.  Use a crossover cable when:
1. Connecting a computer to a router
2. Connecting a computer to a computer
3. Connecting a router to a router
4. Connecting a switch to a switch
5. Connecting a hub to a hub

12. Connector A
•Pin 1
•Pin 2
•Pin 3
•Pin 4
•Pin 5
•Pin 6
•Pin 7
•Pin 8
Connector B
•Pin 3
•Pin 6
•Pin 1
•Pin 7
•Pin 8
•Pin 2
•Pin 4
•Pin 5
Color Coding

13.  Rollover cables essentially have one end of the cable
wired exactly opposite from the other.
3. Rollover cables cables
Connector A
•Pin 1
•Pin 2
•Pin 3
•Pin 4
•Pin 5
•Pin 6
•Pin 7
•Pin 8
Connector B
•Pin 8
•Pin 7
•Pin 6
•Pin 5
•Pin 4
•Pin 3
•Pin 2
•Pin 1

14. Hub Switch Router Workstation
Hub Crossover Crossover Straight Straight
Switch Crossover Crossover Straight Straight
Router Straight Straight Crossover Crossover
Workstation Straight Straight Crossover Crossover
Cabling / Wiring

15. Installing Cable Guidelines
When running cable, it is best to follow a few simple rules:
• Always use more cable than you need. Leave plenty of slack.
• Test every part of a network as you install it. Even if it is brand
new, it may have problems that will be difficult to isolate later.
• Stay at least 3 feet away from fluorescent light boxes and other
sources of electrical interference.

16. • If it is necessary to run cable across the floor, cover the cable
with cable protectors.
• Label both ends of each cable.
• Use cable ties (not tape) to keep cables in the same location
together.

17. RJ45 connector

18. Making connections - Tools
 Cat5e cable
 RJ45 connectors
 Cable stripper
 Scissors
 Crimping
 Tester

19. 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

20. Step 1 – Strip cable end
 Avoid cutting into conductor insulation

21. Step 2 – Untwist wire ends
 Sort wires by insulation colors

22. Step 3 – Arrange wires

23. Step 4 – Trim wires to size
 Trim all wires evenly

24. Step 5 – Attach connector
 Maintain wire order,
left-to-right, with RJ45
tab facing downward

25. Step 6 - Check
 Do all wires extend to end?
 Is sheath well inside connector?

26. Step 7 - Crimp
 Squeeze firmly to crimp connecter
onto cable end (8P)

27. Step 8 – Test
 Does the cable work?

28. Let’s go to work!