Part one of term paper
itself is a rather simple appliance. A microphone, called the transmitter, and an earphone, called the receiver, are contained in the handset. The microphone converts speech into its direct electrical analog, which is transmitted as an electrical signal; the earphone converts received electrical signals back to sound. The switch hook determi ...

Part two of term paper
... during the 30's when telephone service became economically feasible and also reliable. Men and women alike were captivated by the intrique and fascination of talking to relatives and friends, miles and miles away. Not only did the telephone pamper to individual woes, but it provided a very useful industrial service. It allows commercial companies to expand their horizons infinitely easier than ever before. It became possible to set up meetings and discuss business matters with partners thous ...