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daksh007
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on Wed Jan 16, 2019 12:01 pm
1891 - First automatic dialing system invented by a Kansas City undertaker. He believed that crooked operators were sending his potential customers elsewhere. It was his aim to get rid of the operators altogether.
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faizan khan
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on Wed Jan 16, 2019 12:01 pm
Prior to the invention of the telephone switchboard, pairs of telephones were connected directly with each other, which was primarily useful for connecting a home to the owner's business (They practically functioned as a primitive intercom). A telephone exchange provides telephone service for a small area. Either manually by operators, or automatically by machine switching equipment, it interconnects individual subscriber lines for calls made between them.


Last edited by faizan khan on Wed Jan 16, 2019 12:01 pm; edited 1 time in total
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daksh007
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on Wed Jan 16, 2019 12:01 pm
1904 - "French Phone" developed by the Bell Company. This had the transmitter and receiver in a simple handset.
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daksh007
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on Wed Jan 16, 2019 12:01 pm
1911 - American Telephone and Telegraph (AT & T) acquire the Western Union Telegraph Company in a hostile takeover. They purchased stocks in the company covertly and the two eventually merged.
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daksh007
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on Wed Jan 16, 2019 12:01 pm
1921 - The switching of large numbers of calls was made possible through the use of phantom circuits. This allowed three conversations to take place on two pairs of wires.
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daksh007
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on Wed Jan 16, 2019 12:01 pm
1936 - Research into electronic telephone exchanges began and was eventually perfected in the 1960's with the electronic switching system (SES).
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daksh007
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on Wed Jan 16, 2019 12:01 pm
1946 - Worlds first commercial mobile phone service put into operation. It could link moving vehicles to a telephone network via radio waves.
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daksh007
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on Wed Jan 16, 2019 12:02 pm
1936 - Research into electronic telephone exchanges began and was eventually perfected in the 1960's with the electronic switching system (SES).
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faizan khan
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on Wed Jan 16, 2019 12:02 pm
In Bell's lecture, during which a three-way telephone connection with Hartford and Middletown, Connecticut, was demonstrated, he first discussed the idea of a telephone exchange for the conduct of business and trade. On 3 November 1877
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daksh007
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Tell about invention of Telephone ? - Page 12 Empty Re: Tell about invention of Telephone ?

on Wed Jan 16, 2019 12:02 pm
1946 - Worlds first commercial mobile phone service put into operation. It could link moving vehicles to a telephone network via radio waves.
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daksh007
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on Wed Jan 16, 2019 12:02 pm
1980's, 1990's, to present - Huge advances in micro electronic technology over the last two decades have enabled the development of cellular (mobile) phones to advance at a truly astonishing rate. A cellular (mobile) phone has its own central transmitter allowing it to receive seamless transmissions as it enters and exits a cell.
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karan
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on Wed Jan 16, 2019 12:18 pm
Alexander Graham Bell is best known for his invention of the telephone, for which he received his first patent in 1876.
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karan
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on Wed Jan 16, 2019 12:18 pm
Despite the hundreds of lawsuits that would challenge his claim to the invention, none would prove successful.
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karan
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on Wed Jan 16, 2019 12:18 pm
Born in Scotland and later becoming a U.S. citizen, Bell spent his life in pursuit of scientific discovery, and despite his myriad accomplishments as a scientist and inventor, he saw himself first and foremost as a teacher of the deaf, dedicating the majority of his work to that field.
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karan
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on Wed Jan 16, 2019 12:18 pm
Bell was born on March 3, 1847 in Edinburgh, Scotland, the second born son of Alexander Melville Bell, a teacher of elocution, and Eliza Grace Symonds, a hearing-impaired pianist.
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karan
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on Wed Jan 16, 2019 12:19 pm
While not the best student, Bell had an uncanny talent for problem solving. At 12 years old, he invented a farming device for his friend’s father that quickly and efficiently removed the husks from wheat grain.
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karan
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on Wed Jan 16, 2019 12:19 pm
After being homeschooled and attending private school for a year, Bell went on to the Royal High School at Edinburgh but eventually dropped out because he didn’t enjoy the mandatory curriculum.
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karan
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on Wed Jan 16, 2019 12:19 pm
Although Bell had a tense relationship with his own father, he was heavily influenced by him and his grandfather, both of whom devoted their careers to voice mechanics and elocution. Bell followed in their footsteps and became a teacher for the deaf.
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karan
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on Wed Jan 16, 2019 12:19 pm
After the deaths of his older brother Melville James and younger brother Edward Charles from tuberculosis, Bell and his family moved to Ontario, Canada, in 1870, seeking a healthier climate.
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karan
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on Wed Jan 16, 2019 12:19 pm
A year later, Bell found his way to the U.S. and began teaching at the Boston School for Deaf Mutes and similar facilities in the area.
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karan
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on Wed Jan 16, 2019 12:20 pm
While a teacher, Bell met 15-year-old Mabel Hubbard, one of his deaf students.
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karan
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on Wed Jan 16, 2019 12:20 pm
Despite a 10-year age gap, the two fell in love and were married in 1877.
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karan
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on Wed Jan 16, 2019 12:20 pm
The couple would go on to have four children: daughters Elsie and Marian, as well as two sons who died as infants.
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karan
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on Wed Jan 16, 2019 12:20 pm
While a teacher for the hearing impaired, Bell was asked by a group of investors — one of whom was his father-in-law Gardiner Hubbard — to help perfect the harmonic telegraph.
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karan
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on Wed Jan 16, 2019 12:20 pm
The device was one of the most exciting innovations of the day, allowing for multiple messages to be sent over wire simultaneously.
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