Telephone
Telephone is a major invention of the nineteenth century that has brought the segregated factions of the world into a single unit. Alexander Graham Bell is credited with the invention of telephone. The telephone is basically a telecommunications device that helps in transmitting and receiving the voice. The equipment required for an end user to communicate through telephone is the handset. The handset has two ends in the receiver – the mouthpiece to carry your voice to the other end and the receiving end to hear the voice from the opposite end. Wherever you be in the world, you only have to pick up the receiver, dial the registered number of your opposite end and wait for him/her to receive the call. Once the person on the other end picks up his/her receiver and speaks, you can hear his/her voice and you can communicate your voice to him/her as well.
Though the telephone communication looks so simple to the end user, the technology hidden behind it requires the brainstorming engineering. The voice communicates through the wire to the telephone exchange which in turn redirects the signal to the other end.
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The telephone exchange plays the vital role in communicating voice from one distant end to the other. The voice that the end user hears or communicates does not reach the telephone exchange as voice but as digital signals. These signals reach the distant end through wires. But when the receiver end receives the call, he/she is not aware of any signal because by then the signal has converted into sound by the telephone transmitter.
Different modes of telephone service like prepaid telephone and digital telephone are available in the recent times. Calls can be made within the city or at any part of the world with the payment of a specific charge. The overseas calls demand more charge because of the service charges imposed by various telephone exchanges.
Telephone
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