Data Transmission Modes

Data Transmission Modes

There are three ways for transmitting data from one point to another.

1. Simplex : In simplex mode the communication can take place in one

direction. The receiver receives the signal from the transmitting device.

In this mode the flow of information is Uni-directional. Hence it is rarely

used for data communication.

2. Half-duplex : In half-duplex mode the communication channel is used

in both directions, but only in one direction at a time. Thus a half-duplex

line can alternately send and receive data.

3. Full-duplex : In full duplex the communication channel is used in both

directions at the same time. Use of full-duplex line improves the

efficiency as the line turnaround time required in half-duplex arrangement

is eliminated. Example of this mode of transmission is the telephone

line.