INTRODUCTION OF MULTIPLEXING

-         PROCESS OF SIMULTANEOUSLY TRANSMITTING TWO OR MORE INDIVIDUAL SIGNALS OVER A SINGLE COMMUNICATION CHANNEL OR LINK.

·         MUX: MULTIPLEXER

·         DEMUX: DEMULTIPLEXER

FDM and WDM :  

-        Used to deal with analog information

-        Individually signal to be transmitted are assigned a different frequency or wavelength within a common bandwidth.

TDM :

-        Used for digital information

-        Multiple signals are transmitted in a different time slot.