Analog Communication
The analogue communications are
the older telephone systems function which use analogue signals to represent
voice modulation patterns by means of variation in wave forms. The telephone
line transmits data in analog format and the MODEM (Modulator/De-modulator) convert
the analogue information to digital information (and vice versa) to and from
the terminal. Usually, an analogue communication system requires a Modem at
both ends of the line so that the signals received by distant computer can be
reconverted to a digital form prior to being input for processing.
Digital Communication
The digital communication consists
of series of on/off electrical pulses
representing data in binary code. Digital technology has a number of advantages
over the analog; these include higher transmission speed, lower incidence of errors,
and the facility for mixing data consisting of voice, image and text on the
same circuit.
Baseband Communication
Baseband communication is a
type of digital data transmission in which each medium (wire) carries only one
signal, or channel, at a time. Most communications involving computers use
baseband transmission and these includes communication from the computer yo
devices (printers, monitors and so on), communications via modems and the majority
of Networks.
Broadband Communication
This is a standard for
transmitting voice, video and data at the same time over fiber optic telephone
lins. It is also an international communications standard for sending voice,
video and data over digital telephone lines or normal telephone wires and it allows data to be transmitted simultaneously
across the world using end-to-end digital connectivity.
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