The combining of two or more information channels onto a common transmission
medium is called multiplexing.
In electronical communications, the two basic forms of multiplexing
are time-division multiplexing (TDM) and frequency-division multiplexing
In optical communications, the analog of FDM is
wavelength-division multiplexing WDM.
A simple form of multiplexing is to use a lot of wires in one
cable. This is called space division multiplex.
The application shows graphics for all three multiplexing types