FP303 CN: Simplex, Half-Duplex and Full-Duplex

Dear students,

Added information based on data communication. These topic briefly discusses the modes of channel operation namely, simplex, half-duplex and full-duplex operation. Mode of data transmission:

Simplex Transmission

1. In simplex transmission, data flow only in one direction from the sending device to the receiving device.
2. Simplex transmission is used only when the sending device does not require a response from the receiving device.
3. Security systems and fire alarms that contain a sensor use simplex transmission.
4. Example: Watching television 

Half-Duplex Transmission

1. In half-duplex transmission, data can flow in either direction -- from the sending device to the receiving device, and back -- but only in one direction at a time.
2. Many fax machines, credit card verification systems, and automatic teller machines use half-duplex transmission.
3. Example: Walkie Talkie

Full-Duplex Transmission

1. In full-duplex transmission, data can flow in both directions at the same time.
2. A regular telephone line supports full-duplex transmission so that both parties can talk at the same time.
3. Example: Telephone