Communications system

Communication is the act of conveying intended meanings from one entity or group to another through the use of mutually understood signs and semiotic rules.

Fiber-optic communication systems transmit information from one place to another by sending light through an optical fiber.

[1][page needed][2][page needed][3] A radio communication system comprises a transmitting conductor[4] in which electrical oscillations[5][6][7] or currents are produced and which is arranged to cause such currents or oscillations to be propagated through the free space medium from one point to another remote therefrom and a receiving conductor[4] at such distant point adapted to be excited by the oscillations or currents propagated from the transmitter.

An antenna is basically a small length of a conductor that is used to radiate or receive electromagnetic waves.

These systems are commonly designed to integrate the cross-communication of messages between are variety of communication technologies.

A Voice Communication Control System (VCCS) is essentially an ACD with characteristics that make it more adapted to use in critical situations (no waiting for dial tone, or lengthy recorded announcements, radio and telephone lines equally easily connected to, individual lines immediately accessible etc..) Sources can be classified as electric or non-electric; they are the origins of a message or input signal.

These types of sensors are called input transducers in modern analog and digital communication systems.

Guided media refers to any medium that can be directed from transmitter to receiver by means of connecting cables.

Air is the only thing between the transmitter and receiver for RF communication while in other cases, like sonar, the medium is usually water because sound waves travel efficiently through certain liquid media.

Communication channels include almost everything from the vacuum of space to solid pieces of metal; however, some mediums are preferred more than others.

The goal of the receiver is to capture and reconstruct the signal before it passed through the transmitter (i.e. the A/D converter, modulator and encoder).