preview

The Invention of the Telephone and How It Has Changed Over the Years

Good Essays

The Invention of the Telephone and How It Has Changed Over the Years About 100 years ago, Alexander Graham Bell invented the telephone by accident with his assistant Mr. Watson. Over many years, the modern version of the telephone 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 marvelous invention allows us to communicate with the entire globe 24 hours a day just by punching in a simple telephone number. It is the most used piece of electronic apparatus in the world. It is probably one of the most easy to use electronics available too. All you have to do is pick up the receiver, …show more content…

TELEPHONE NETWORKS If you have ever opened up a phone (do not try this at home, you might screw it up) you will probably see a PC (printed circuit) board. The board contains the needed electronics for the phone to work properly. In older models of a working telephone, this board may look like an electronic box. This board is called the telephone network. The telephone network's function is to provide all the necessary components and termination points (screw on or push on terminals). The components and the termination points connect and match the impedance of a handset (transmitter and receiver) to a two -- wire telephone circuit. Every component in the telephone has to be connected to the PC board. Usually, the board is the most reliable component inside the phone. All the delicate components are securely sealed by a metal enclosure. The PC board is a very fragile object and can be broken easily. If you look closely, you can see wires poking out of the board. The wires are soldered to the terminal legs. If you break one of those wires, man are you dead! TELEPHONE HOOK SWITCH Every time you talk over a line, you always need to disconnect. The most simple thing to do is to let the handset sit down. While sitting down, the handset can give force to a spring loaded operating arm, which is connected to a number

Get Access