multipleinxing in computer network with types

1. Computer network
By
P. GOPINATH,M.C.A.,
ASSISTANT PROFESSOR
DEPARTMENT OF COMPUTER SCIENCE

2. Multiplexing
Its is set of techniques. That allows to
combine multiple signals for transmission over a
single line.

3.  MUX :
MULTIPLEXER  MANY TO ONE
 DEMUX:
DEMULTIPLEXER  ONE TO MANY

4. Three types of multiplexing
1. Time Division Multiplexing (TDM)
2. Wavelength Division Multiplexing(WDM)
3. Frequency Division multiplexing (FDM)

5. Time Division Multiplexing(TDM)

6. TDM
 TDM is the digital multiplexing technique.
 In TDM the channel / link is not divided on the
basis of frequency but on the basis of time.
 Total time available in the channel is divided
between several users.
 Each user is allotted a time interval called time
slot or time slice during which the data
transmitted by that user

7.  The each sending device takes control of entire bandwidth
of the channel for fixed amount of time.
 In all the signals to be transmitted are not transmitted
simultaneously. In stead they are transmitted one by one.
 Thus each signal will be transmitted for a very short time.
 The TDM system can be used to multiplex or digital
signals