History
This is where you will find all the pages tagged History.
History of Watches
A timeline in the history of the watch.
History of mobile phones
Mobile rigs were the beginning of mobile phones, along with taxicab radios, two way radios in police cruisers, and the like. A large community of mobile radio users, known as the mobileers, popularized the technology that would eventually give way to the mobile phone. Originally, mobile phones were permanently installed in vehicles, but later versions such as the so-called "bag phones" were equipped with a cigarette lighter plug so that they could also be carried, and thus could be used as either mobile or as portable phones.
What was possibly the first real mobile phone, in the sense that it was connected to the telephone network, was tested by the Swedish police in 1946 for use in police cruisers. A half dozen calls could be made before the police car's battery ran out. Radiophones began to be publicly available in the US at the end of the 1940s, though the distinction between such phones and a two-way radio becomes blurry since special systems are required to "patch" into the phone network with the assistance of human operators.
In December 1947, D. H. Ring, a Bell Labs engineer, proposed hexagonal cells for mobile phones. Phil Porter, also of Bell Labs, proposed that the cell towers be at the corners of the hexagons rather than the centers and have directional antennas that would transmit/receive in 3 directions (see picture at left).
Recognizable mobile phones with direct dialing have existed at least since the 1950s. In the 1954 movie Sabrina, the businessman Linus Larrabee (played by Humphrey Bogart) makes a call from the phone in the back of his limousine.
The first fully automatic mobile phone system, called MTA (Mobile Telephone system A), was developed by Ericsson and commercially released in Sweden in 1956. This was the first system that didn't require any kind of manual control, but had the disadvantage of a phone weight of 40 kg. MTB, an upgraded version with transistors (weighing "only" 9 kg), was introduced in 1965 and used dual-tone multifrequency signaling. It had 150 customers in the beginning and 600 when it shut down in 1983.
For a discussion of the history of the Mobile Radio Service (MRS), and Improved Mobile Radio Service (IMRS) prior to the cellular mobile telephone AMPS in the US. Because of the long waiting time to be issued an MRS or IMRS radio telephone in the 1960's and 1970's, "autopatch" telephone conversations became popular among amateur radio operators with the advent of FM repeaters. Because of Federal Communications Commission rules concerning the Amateur Radio Service, business conversations were prohibited from such calls.
One of the first truly successful public commercial mobile phone networks was the ARP network in Finland, launched in 1971. Posthumously, ARP is sometimes viewed as a zeroth generation (0G) cellular network, being slightly above previous proprietary and limited coverage networks.
Dr. Martin Cooper of Motorola, with the DynaTAC 8000X, first unveiled in 1983. Dr. Cooper made the first analogue mobile phone call on a larger prototype model in 1973.
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Dr. Martin Cooper of Motorola, with the DynaTAC 8000X, first unveiled in 1983. Dr. Cooper made the first analogue mobile phone call on a larger prototype model in 1973.
On April 3, 1973, Motorola employee Dr. Martin Cooper placed a call to rival Joel Engel, head of research at AT&T's Bell Labs, while walking the streets of New York City talking on the first Motorola DynaTAC prototype. Motorola has a long history of making automotive radio, especially two-way radios for taxicabs and police cruisers.
In 1978 Bell Labs launched a trial of first commercial cellular network in Chicago using AMPS.
History of mobile phones - Wikipedia
Top 10 mobile phone design classics
The good, the bad and the ugly...?
A photo series showing the best and worst of mobile phone design since 1984.
Photos: Top 10 mobile design classics - PDAs - Breaking Business and Technology News at silicon.com
The History of Nokia Mobile Phones until 2002
The development of mobile phones has made the devices smaller, their technical design more complex and increased the number of available functions.When Nokia Talkman was introduced in 1984, few people would have guessed that this bulky and heavy mobile phone would develop into a lightweight and versatile communications tool in the foreseeable future. Today, sending text messages, playing games and picture taking are all part of the everyday life of mobile phone users.
See how Nokia's mobile phones have developed, from the bulky NMT phones of the 80s to the pocket-sized multimedia phones of the 2000s.
