Featured Article
History of cellphones
Cellphones, also known as Cellular Telephones, became the first wireless telephone when it was launched in the 1980s.
Radios in taxis, mobile rigs, and the 2-way police radio system became the cellphone's early ancestors. These systems are only used inside the cars, but a large number of the so-called mobileers or a group of portable radio users fashioned the technology. This gave birth to mobile phones. During that time, the machinery is called as the "bag phone" because it also carries cigarette lighters.
In 1946, the first ever true cellphone was introduced in Sweden. The system was linked to a telephone network and was experimented in a local Swedish police station as a 2-way radio police cruiser.
Finland's ARP Network became the first thriving public commercial mobile phone network in the world when it was created in 1971. The technology is highly regarded as a zeroth generation or (0G) network which only carries limited area coverage. In April 3, 1973, the era of modern cellphone was launched by Motorola.
At some point in the 1980s, analog-based cellular phones were introduced in the market. The structure was supported by cellular networks with several interconnected base stations. It also has a common procedure for handling over calls located in between two cells. During this time, cellphone units have a bulky and large dimension. Soon after, Motorola launched the so-called hand held phones. Some of the company's first portable systems are AMPS, RTMI, Radiocom 2000, NMT, TACS, and C-Netz. These classifications became the first generation or (1G) cellular phones.
The second generation (2G) system was initiated in the 1990s with the introduction of IS-136 ("TDMA"), IS-95 ("CDMA"), iDEN, and GSM cellphones. In 1990, the first digital cellphone was created in the US.
At present, the 3G mobile phone system is now in its infancy stage. This system, which includes CDMA2000 1xEV-DO and UMTS, uses advanced technology than the 2G.
Copyright © 2005 4 Audio Net. All rights reserved. |