answer all the question! Answer any one $(01)$ Question from $1$ & $2$ :

$11\mathrm{.}5=1\mathrm{.}5$

Explain the Elements of a communication system with block diagram.

What are the advantages of Automatic switching systems over the manual exchanges?

Answer any three $(03)$ Questions from $3$ to $8$:

$34=12$

How are switching systems classified? In what way is stored program control superior to

Hard$-$wired control?

Write the working principle of a half$-$duplex telephone circuit.

Explain the Switching System Parameters.

Describe the working of a rotary switch.

Show how a uniselector can be used as a selector hunter or line finder.

In Strowger exchanges, a call may be blocked even though an appropriate path through

the switch exists. Explain how this can happen.