Space switching
Space switching there is a dedicated
path (two parallel wires) established between the caller and called subscribers
for the entire duration of call in the exchange by the
switch. Developed for analog environment, Separate physical paths. Non-blocking
switching type. Less signaling requirement from the network. This means then the conversation is
going on the switch create the link between two sides. At that time only that call is going
in the path.
Time switching, it was coming when the
PCM is introduced. This switching system involves
the sharing of cross points for shorter periods of time. It uses to interchange time slots. In this switching all the components
are electronics. Therefore, in time division switching, greater savings in cross points can be achieved. Mostly all modern
circuit switches are time-division switches. Multiple low speed inputs share a
high speed line. It is based on synchronous TDM.
