I am very new to the Telecom world. I have a basic doubt. Why people
> are using the SS7 protocol instead of TCP/IP Stack.
Because they are totally different things for totally different jobs.
IP isn't even remotely designed for realtime applications. The current trend of using IP for everything under the sun because the hardware is cheap and available mostly is possible only because bandwidth is cheap too.
--scott
"C'est un Nagra. C'est suisse, et tres, tres precis."