Telephone technology from the crank phone to the smartphone to.
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Transcript of Telephone technology from the crank phone to the smartphone to.
![Page 1: Telephone technology from the crank phone to the smartphone to.](https://reader034.fdocuments.net/reader034/viewer/2022051113/56649d9c5503460f94a85910/html5/thumbnails/1.jpg)
Telephone technologyfrom the crank phone to the
smartphone
to
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The invention of the telephone• In the 1870s, two inventors Elisha gray and Alexander Graham Bell both independently designed devices that could
transmit speech electriclly (the telephone) A crank telephone produced a voltage that operated a relay on the Operator's switchboard that would drop a little flag and indicate to the operator that you wanted to make a call.
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Switchboard operators • The switchboard operators were invented on 1921 in omaha nebraska. The number
of callers soon increased. By 1946 nearly a quarter million switch board operators were employed by at&t. switchboard operators were used by converting sound waves into electrical signals , and electrical signals into sound waves
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Hand cranked wall phones
• The hand cranked wall phone was invented in the was invented in the 1880s by Alexander Graham Bell
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Candlestick phone
• Candlestick phones were invented in the 1890s
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Cradle phones
• Cradle phones were invented in the 1890 a wile after the candlestick phone came out
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Candlestick rotary phone
• The candlestick rotary phone was invented in 1914
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Desktop rotary phone
• The desktop rotary phone was invented in the 1920s
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Touchtone phone
• The touchtone phone was invented in the 1960
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Cordless phone
• The cordless phone invented in the 1980 and was convenient because it had no cord so you wouldnt have to put the phone down when you leave the room
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Mobile/cellular phone
• The Mobile/cellular phone came out in 1983 and was very big and blocky. It was also hard to carry around due to its size
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Candy bar phone
• The candy bar phone came out in the 1990s and was a lot smaller and more compact then the 1983 mobile/cellular phone
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Flip phones
• The flip phone was released in the early 2000s and was slimmer then any mobile phone before it
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Keyboard phones• The keyboard phone was the first phone with
a full keyboard that made it easy to send text messages
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Smart phones
The smart phone was a big jump from the cell phones before it because you could send emails and use the web wile on your phone
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The touch phone/ iphone
• The touch phone or iphone is the latest cell phone today and has a full keyboard web surfing , email, facebook, gps , mapping systems, games and more .
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Then and now
Form the crank phone to the iphone