Part one of term paper
The Asynchronous Transfer Mode has been chosen as the standard system concept for integrated broadband communication networks by the ITU﷓T. The system is predicted to grow rapidly as soon as it becomes widely accepted by network operators and users. Why has communications evolved in history towards the ATM concept and why has it been c ...

Part two of term paper
... invention of the vacuum tube led to the introduction of frequency division multiplexing (FDM) in 1925, and therefore the ability to make multiple connections on a single line. The public switched telephone networks (PSTNs) expanded, but with the circuit switched transfer mode remaining in use. This is because it provided an obvious way of keeping the constant connection necessary for voice traffic. The invention of the transistor and the concept of pulse code modulation (PCM) allowed digital commu ...