what is multiplexing technology? what are its applications in telecommunications?

Question

what are basics of multiplexing technology? what all does it include? what are its uses? how is it used in the telecommunication industry? what are its military applications?

Answer 1

Time division multiplexing is where you give each signal a certain amount of time to send data before both the sending and recieving systems acknowledge that the next data packet will be a different message. I.e. if you and I are trying to send the messages:

You: This is me
Me: Multiplex

down a fibre cable then the first second (for example - usually considerablly shorter [microseconds and less]) is devoted to your message allowing you to send:

This i

then the next second both systems know is my message allowing me to send

Multip

then your second (or the next person) to send any more:

s me

then my second to send:

ex

etc. So multiplexing allows the splitting of data streams to send multiple data streams down a single media serially (I believe).


A google define search (type "define:Multiplex" in google) gives:

"The act of combining input signals from many sources onto a single communications path, or the use of a single path for transmitting signals from several sources. Advantages of multiplexing is that it doubles the capacity of television transmission and allows for simultaneous feed of independent programs for two audiences."

Answer 2

A technique used to transmit several data signals down 1 line. Each data signal is given priority to the medium for a period of time.
Multiplexing is a general term for an electronic system that converts several inputs into 1 output.
it consists of;
inputs(more than 1)
output (1 of) and
control signal

Example 1 is a security camera multiplexer.
6 cameras are wired into a multiplexer.
1 Monitor is wired into the multiplexer.
A control signal enables one of the cameras to be displayed on the monitor.

Example 2 is a phone multiplexer
2 phone lines are wired into a multiplexer
which then connect onto the bt exchange
the multiplexer has an integral control circuit.

The analogue signals from the 2 voice lines are converted to digital and transmitted along the single bt line

Answer 3

I know the answer to this from an optical (ie fibre optic) point of view. You can add additional signals to a fibre by selecting a different wavelength (colour). This does not interfer with the performance at other wavelengths and adds to the bandwidth of the fibre.
You need a demultiplexer at the other end to separate out the colours.
Huge applications in telecomms, datacomms, military, etc, etc

Answer 4

it involves converting analog to digital or vice versa. Google it and you will learn about it, but it ain't easy. xxx