Part 1 of Essay
About 100 years ago, Alexander Graham Bell invented by accident with his assistant Mr. Watson. Over many years, the modern version of makes the one that Bell invented look like a piece of junk. Developments in tone dialing, call tracing, music on hold, and electronic ringers have greatly changed the telephone. This mar ....

Part 2 of Essay
.... there are those that hang on the wall, on the desk, etc. THE HANDSET No matter what kind of telephone you own, there has to be some device that allows you to talk to and listen to. This device is called the handset. The handset is usually made out of plastic and inside it are two main components: the transmitter and the receiver. THE TRANSMITTER It is the job of the transmitter to turn the air pressure created by your sound waves to electrical signals so they can be sent to the other telephone. The waves ....