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contributions to the telephone
among the contributions introduced,the use of reinforced copper in towoway cables was highlighted;the invention of signal repeaters or amplifiers;the ground use of radio techniques -
Phone inventor
in the year 1876 the creator was antonio meusi -
The first telephone exchange
he settled in New Haven, in the American state of Connecticut, in January 1878. He had twenty-one subscribers, among them the novelist Mark Twain. When the originator of the call picked up his receiver, an electric switch was activated in the switchboard that warned the operator, and the operator moved a lever asking the subscriber with whom he wanted to speak. -
the first public telephone
public telephone by coins, invented in 1889 by the North American William Gray.
The first public device was available to people in a bank in the city of Hartford, Connecticut: its inventor, associated with others, created in 1891 the coin phones in a chain of department stores. -
phone called Bakelite
in 1950 the phone called bakelite was created,this madel is also available with the black disk (on request) double bell bell,working correchyto send and receive calls.is adapted to the current telephone connection -
inventor of the cell phone martin cooper
the first cell phone was created to allow reduce the great distances carrying wings people can be greater.frequency and ease,was created by martin cooper between 1970 and 1973 called motorola dynan jac 800x -
facilities for which the cell phone was created
with the creation of the cell phone in 1973 facilitated the ability to and easy to carry the cell phone everywhere -
first generation of cell phones
first generation cell phone in the 80s was created the first cell phone called(dynatac 800x) and generation predominant was the AMPS(advanced mobile phone system). -
Cell phone sold in Europe
1981 europe introduced a system similar to AMPS advanced mobile phone system -
sales of the first cell phone in 1984
1984,sold around 90.000 phone on going significantly estimated amount -
second generation of cell phones
second generation of the cell phone this arises in the 1990 with cell phones with period extended battery and more sound quality this decade were -
the first smartphone
1992 was created the first smartphone for hurtado,was the functions of PDA (personal digital assistent personal digital) capatobles phone and sms an touch secreen,the first smarphone was the ericsson 6588 -
third generation of cell phones
third generation of cell phones arises with the creation of the smartphone in 1992 with cell phones with chip(simcard) where the information is found,with photo cameras and some allowed to shoot a few minutes,edor screen -
sony ericsson t68i
it was the bridge between "silly" cell phones and what we now call "smart",because it included features such as bluetooth,dua-track mims,wap,browsing and email,in addition to having a cold color screen. -
the Iphone
certainly the best event smartphone was the announcement of the iphone and ios in 2007,also revolutionized industry telephone mobile and smartphones. -
operating system of the first cell phone
2007 the smartphone started with windows operating system pocket pc (2000) also came to market the brand HTC -
HTC DREAM
it was the first android phone,that is,it was the first phone that challenged the iphone in the war of the smartphones touch screen -
creator of the iPad
the ipad created in by steven jobs -
The fourth generation cell phone
The fourth generation is the technological evolution that offers the mobile phone user a greater bandwidth, which allows, among many things, the reception of television in high definition. such as the Nokia Morph.
today there is a system of this level operating effectively only with some companies of E.E.U.U; called LTE. -
iphone x
is one of the most sold cell phones in 2018, this OLED screen, which Apple calls Super Retina HD, can produce much deeper blacks. has a more durable battery, comes with two 12-megapixel cameras on the back and 7 megapixel cameras on the front, both the iPhone X and iPhone 8 Plus have an additional rear camera sensor.
