CLASSES OF TRANSMISSION MEDIA

It uses a conductor such as a wire or a fiber optic cable to move the signal from sender to receiver

It uses radio waves of different frequencies and do not need a wire or cable conductor to transmit signals

Below are Design Factors for Transmission Media except.

Consists of two insulated copper wires arranged in a regular spiral pattern to minimize the electromagnetic interference between adjacent pairs.

A twisted pair where each wire is insulated with plastic wrap, but the pair is encased in an outer covering. o UTP cables are found in many Ethernet networks and telephone systems. For indoor telephone applications

The pair is wrapped with metallic foil or braid to insulate the pair from electromagnetic interference

It is a type of 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.

Relatively new transmission medium used by telephone companies in place of long distance trunk lines. Also used by private companies in implementing local data communications networks. Require a light source with injection laser diode (ILD) or light-emitting diodes (LED).

Types of Fiber Optics:

The reflective walls of the fiber move the light pulses to the receiver

Acts to refract the light toward the center of the fiber by variations in the density

the light is guided down the center of an extremely narrow core

Wireless Transmission Examples:

It is used for long-distance telephone service. It also uses radio frequency spectrum, from 2 to 40 Ghz . A parabolic dish transmitter, mounted high . It iused by common carriers as well as private networks and requires unobstructed line of sight between source and receiver

Used for television signal distribution