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What is the need of CPG message in ISUP protocol?


Consider any call forwarding scenario.As soon as switch receives Setup, it checks that the Called_Party has forwarded option activated and so tries to forward the call. Meanwhile, Switch sends CPG message towards originator saying that Call is in Progress.

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Line of sight is?
a) Straight Line
b) Parabolic
c) Tx & Rx should be visible to each other
d) none of the above
Purpose of PC(Program Counter) in a Microprocessor is?
a) To store address of TOS(Top Of Stack)
b) To store address of next instruction to be executed.
c) count the number of instructions.
d) to store base address of the stack.