Explain the working of telephone network along with devices
Answers
It was one of those moments when the world changes forever. On March 10, 1876, Thomas Watson was staring at a strange piece of electrical apparatus when he heard it speak the words that made history: "Mr Watson! Come here! I want to see you!" Those three short exclamations mark the moment when the telephone properly came into being, thanks to Watson's brilliant colleague Alexander Graham Bell (1847–1922). Since that moment, a little over a century ago, the telephone has become one of the most commonplace inventions in the world. Apart from handling voice calls, it helps us send documents by fax and it's also the basic infrastructure on which the Internet is built. Telephones seem quite simple.
PSTN uses circuit switching to allow users to make landline telephone calls to one another. The call is placed after it is routed through multiple switches. These switches are found in a central office (CO) or in a wire center. Ultimately, voice signals are able to travel over the connected phone lines.
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