Solution:-
A communication network consists of a collection
of devices (or nodes) that wish to communicate and inter-connect together. The
primary objective in any communication network is simply moving information
from one source to one or more destination nodes.
Space
Division Switching:-
In space-division switching each input
takes a different physical path in the switch matrix depending on the out-put.
Hence, when a connection is established through a space switch matrix, a
permanent physical contact is made on the matrix of cross-points. The
connection will be maintained throughout the call duration. This technology can
be primarily developed to accommodate analog transmission. Figure Below.............
Time
Division Switching:-
Time division switch, the n input
lines are scanned in sequence to build up an input frame with n slots. Each
slot has k bits. For T1 switches, the slots are 8 bits, with 8000 frames
processed per second. The heart of the time division switch is the time slot
interchanger, which accepts input frames and produces output frames, in which
the time slots have been reordered according to mapping table in the memory of
the switch. Finally, the output frame is de-multiplexed with output slot 0
going to line 0, and so on. In essence, the switch moves data from input lines
to output lines according to the mapping table even though there are no
physical connections between these lines. Figure below.............
