transmission modes and methods

1. 1/7/2021SINA Institute of Networks and Aesthetics

2. OPTICAL FIBER
Professional course
1/7/2021SINA Institute of Networks and Aesthetics

3. COURSE OUTLINE
• Communication
• Telecommunication
• Transmission modes
• Transmission methods
• Q&A session
1/7/2021SINA Institute of Networks and Aesthetics

4. COMMUNICATION
• Communication is sending and receiving information between two or more people.
The person sending the message is referred to as the sender , while the person
receive the message is called receiver. The information conveyed can include facts,
ideas, concepts , beliefs , attitudes, instruction and even emotions.
1/7/2021SINA Institute of Networks and Aesthetics

5. TELECOMMUNICATION
• Telecommunication is the transmission of signs, signals, messages, words , writings
,images and sounds or information of any kind by wire, radio waves, optical or other
electromagnetic systems . some real life examples like mobile phone.
1/7/2021SINA Institute of Networks and Aesthetics

6. TRANSMISSION MODES
The term transmission mode defines the direction of flow of information between two
communication devices.
• The way in which data is transmitted from one place to another is called data
transmission mode.
• It indicates the direction of flow of information.
• It is also called the data communication mode.
• Data transmission modes are also referred to as directional modes.
1/7/2021SINA Institute of Networks and Aesthetics

7. 1/7/2021SINA Institute of Networks and Aesthetics
Transmission mode
Simplex
Duplex
Half Duplex
Full Duplex

8. SIMPLEX MODE
• Data can flow in only one direction.
• i.e. communication is unidirectional.
• In this mode, a sender can only send data but can not receive the data. similarly a
receiver can only receive data but can not send it.
• sender to receiver only
1/7/2021SINA Institute of Networks and Aesthetics
Sender Receiver

9. EXAMPLES
• Some examples of simplex mode:
• Keyboard or Mouse inputs to CPU.
• CPU output to Monitor.
• Computer - to - Printer.
• Scanner - to – Computer.
• Radio and T.V Transmission.
1/7/2021SINA Institute of Networks and Aesthetics

10. HALF DUPLEX
• Data can flow in both direction but in one direction at a time.
• When one device is sending the other device can only receive and vise versa.
• For example :
• walkie – talkie.
• Internet Browsers.
• (A - to - B) or (B - to - A)
1/7/2021SINA Institute of Networks and Aesthetics
A B

11. FULL DUPLEX
• Data can flow in both direction at the same time.
• It is bidirectional.
• Data can be sent in both directions simultaneously.
• We can send as well as we can receive the data.
• Examples are telephone network and mobile phone.
• (A to B) or (B to A)
1/7/2021SINA Institute of Networks and Aesthetics
A B

12. 1/7/2021SINA Institute of Networks and Aesthetics
Transmission methods
Serial transmission
Parallel transmission

13. SERIAL TRANSMISSION
• A method of transmission in which data is sent one bit at a time is called serial
transmission.
• Serial transmission is slower than parallel transmission as data is sent sequentially
one bit at a time.
• Telephone line use this method of data transmission.
1/7/2021SINA Institute of Networks and Aesthetics

14. 1/7/2021SINA Institute of Networks and Aesthetics
Sender Receiver0 1 1 0 0 0 1 1
Serial transmission

15. PARALLEL TRANSMISSION
• A method of transmission in which group of all bits are sent at the same time over
multiple wire is called parallel transmission.
• Each bit is transmitted over separate line.
• The data transmission between computer and printer is done using parallel
transmission.
• Parallel transmission is faster because all bits are sent at the same time.
1/7/2021SINA Institute of Networks and Aesthetics

16. 1/7/2021SINA Institute of Networks and Aesthetics
Parallel transmission
Sender receiver
0
1
1
1
1
0
0
0

17. 1/7/2021SINA Institute of Networks and Aesthetics
Q&A session