simplex- one way transmission only e.g computer to printer
half duplex-two way transmission but one way at a time e.g walkie talkie radios
duplex-two way transmission e.g telephone
Blog (simplex)
conference call (duplex)
instant message (half duplex)
the role of coder/decoder-
An electronic circuit that converts analog signals into digital signals and digital signals into analog signals. These are primarily used in teleconferencing applications.
Transmission networks-fibre optic-
Optical fibers are widely used in fiber-optic communications, which permits transmission over longer distances and at higher bandwidths (data rates) than other forms of communication. Fibers are used instead of metal wires because signals travel along them with less loss.
