By Jeremy Swann Mrs. Helen Bond 12:40-2:00. Thomas Edison invented the carbon microphone which...
11
THE EVOLUTION OF PHONE TECHNOLOGY By Jeremy Swann Mrs. Helen Bond 12:40-2:00
Transcript of By Jeremy Swann Mrs. Helen Bond 12:40-2:00. Thomas Edison invented the carbon microphone which...
THE EVOLUTION OF PHONE TECHNOLOGY
By Jeremy SwannMrs. Helen Bond
12:40-2:00
Where did the idea of the telephone come from?
The idea of a speaking telegraph wasfirst mentioned by a man named
Innocenzo Manzetti.
The first telephone and Alexander Graham Bell
Although the creator of telephone is a often debated subject.
The very first telephonewas patent by Alexander Graham Bell
In 1876
How do telephones get signal?
Thomas Edison invented the carbon microphone which produced a strong telephone signal.
Long Distance Calling
1915: First U.S. coast-to-coast long-distance telephone call, ceremoniously inaugurated by A.G. Bell in New York City and his former assistant Thomas Augustus Watson in San Francisco, California.
The beginnings of mobile phones
In December 1947, Bell Labs engineers Douglas H. Ring and W. Rae Young proposed hexagonal cell transmissions for mobile phones.[
The Cell Phone era
On April 3, 1973 Motorola manager Martin Cooper placed a cellular phone call (in front of reporters) to Dr. Joel S. Engel, head of research at AT&T's Bell Labs. This began the era of the handheld cellular mobile phone.
1G cell phones
The first commercially automated cellular network (the 1G generation) was launched in Japan by NTT in 1979.
2G cell phones
In the 1990s, the 'second generation' (2G) mobile phone systems emerged, primarily using the GSM standard. These differed from the previous generation by using digital instead of analog transmission, and also fast out-of-band phone-to-network signaling. The rise in mobile phone usage as a result of 2G was explosive and this era also saw the advent of prepaid mobile phones.
3G cell phones
the introduction of several new forward link data rates that increase the maximum burst rate from 2.45 Mbit/s to 3.1 Mbit/s.
protocols that would decrease connection establishment time.
the ability for more than one mobile to share the same time slot.
the introduction of QoS flags.
The Phone Today
Today most people own a cellular phone that performs many functions such as web surfing, picture taking, text and sms messaging, GPS system and many other functions can be found within todays top cellular phones.
