1. WIRED TRANSMISSION MEDIA
PRESENTED BY
Md. Tutul Haque
Roll: 160129
Department of Computer Science & Engineering
Jashore University of Science & Technology
2. OBJECTIVES
Transmission Media
Wired Transmission Media
Twisted-Pair Cable
Coaxial Cable
Fiber-optic Cable
Advantage and Disadvantage
3. TRANSMISSION MEDIA
Transmission media is a pathway that carries the
information from sender to receiver.
Transmission media are actually located below
the physical layer and directly controlled by the
physical layer.
Fig: Transmission medium and Physical layer
5. GUIDED MEDIA
Guided media which are those that provide a conduit from one device to another,
include
Twisted-pair cable
Coaxial cable
Fiber-optic cable
6. TWISTED-PAIR CABLE
A twisted pair cable consists of two conductor (normally copper), each with its own
plastic insulation, twisted together.
Frequency range 5 MHz
Bandwidth 10 Mbps to 1 Gbps
Fig: Twisted-pair cable
8. UTP-UNSHIELDED TWISTED PAIR CABLE
Unshielded twisted-pair is a cable with
wires that are twisted together.
Data transfer rate 10 Mbps to 1 Gbps.
Data transfer range 100m.
UTP cabling is used extensively for local-
area networks (LANs) and telephone
connections.
Fig: UTP Cable
9. STP-SHIELDED TWISTED–PAIR CABLE
Fig: STP cable
Shielded twisted pair is a twisted pair cable
enclosed in foil or mesh shield which blocks
out electromagnetic interference.
Data transfer rate 16 Mbps to 500 Mbps.
Moderately expensive.
10. COAXIAL CABLE
Coaxial cable, or coax, is a type of electrical
cable that has an inner conductor surrounded
by a tubular insulating layer, surrounded by a
tubular conducting shield.
Many coaxial cables also have an insulating
outer sheath or jacket.
Data transfer rate 200 Mbps.
Data transfer range 1km.
Fig: Coaxial Cable
11. Advantages
High transmission rate.
Low noise.
Easy to setup and install.
Use high TV network.
Cheaper than fiber-optic cable.
Frequency 500 MHz.
Disadvantages
More Expensive than twisted-pair
cable.
Without repeater data can not send
more than 1km.
COAXIAL CABLE
12. FIBER-OPTIC CABLE
Fiber-optic cable is a cable consisting of one
or more thin flexible fibers with a glass core
through which light signals can be sent with
very little loss of strength.
Difficult to join.
Low loss of energy.
Speed of its equal to speed of light
Fig: Fiber-optic cable
13. OPTICAL-FIBER COMMUNICATION SYSTEM
Fiber-optic communication is a method of transmitting information from one place to
another by sending pulses of light through an optical fiber. The light forms an
electromagnetic carrier wave that is modulated to carry information
Fig: Optical fiber
15. FIBER-OPTIC CABLE
Advantages
High bandwidth.
Faster data transmission.
Smaller physical size.
Low transmission loss.
Potential low cost.
Free from electromagnetic force.
Disadvantages
More Expensive than twisted-pair
and coaxial cable.
Can be difficult to modify and
install.
16. SUMMARY
Transmission Media
Wired Transmission Media
Twisted-Pair Cable
Coaxial Cable
Fiber-optic Cable
Advantage and Disadvantage