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!