You know how the analogue network, the radio base and when the first call was made on a mobile phone? See also the comparison of the first model launched on the market in 1983 with an Iphone released this year.
The evolution of cell phones and how they went from "bricks" of almost 1 kg for small appliances, fine and super useful
Have you ever stopped to think about how cell phones, which seemed more like a brick years ago, could evolve so much? Yeah. The first mobile phone call was held on April 3, 1973, and the first model launched in the market was the Motorola DynaTAC 8000X, but we'll get it later. The first phones used too often, the analog networks.
Analog Networks
There are three types of analog networks: AMPS, NMT and ETACS. The AMPS is used mainly in the United States, Latin America, Australia, parts of Russia and the Asia-Pacific. The ETACS is used in Europe and Asia Pacific. NMT is used in Scandinavia and some European countries, but also in some places in Russia, Middle East and Asia.
The difference between analogue and digital is that analog signal sent via radio waves. Each signal type is a different wavelength. And the network sends the digital signal by the binary numbers (0 or 1). These signals are sent to the radio base.
What is Radio-Base?
When you make a call with your phone, it emits radio waves which are received by the nearest station. When the base station receives the signal from a phone, send it to another point, which is the switch, which forwards this signal to another station or to the fixed line network, depending on the call. The base station consists of one or more issuers of radio receiver and radio antennae that communicate with individual cellular phones in the area.
The base stations have two limitations: the number of calls that can process and geographical area covered. So the stations are located in strategic areas known as "cells." If these cells are well positioned, they can reuse the radio frequencies available in other cells, increasing the capacity of calls processed and overcome these two limitations.
The evolution of cellular
What was once just a cumbersome, limited and used only as a working tool, today is a product of necessity. Hundreds of models introduced in more than 20 years, but compare the first model launched in the market with an iPhone:
Motorola DynaTAC 8000X (1982)
Motorola 8000X ODynaTAC measured about 33 cm high, 4.5 cm wide and 8.9 cm thick. It weighed 794 grams, was able to memorize up to 30 numbers and the battery lasted 8 hours on standby and one hour of conversation. The phone cost at the time of its release, $ 3,995 ($ 8,598 in today's values) and worked on analogue. It may not have been pretty, but allowed mobile - at least for anyone who could carry it.
Iphone 4 (2010)
Apple released the iPhone 4 this year, which has - besides the touch screen color display and we already know - a front camera that allows video calls through an application called Face Time. The rear camera has a resolution of 5 mega pixels, flash for poor light and recording high definition videos. The screen, which uses technology called "Retina Display" has resolution of 326 pixels (or dots) per inch. The model also has Bluetooth, GPS, and Wi-Fi (wireless internet). In Stand By mode, the phone battery lasts up to 300 hours.
These are just some of the novelties of the new Iphone, but compared to the Dyna-Tac, we can see the evolution of mobile phones and their uses. Before it was possible to make and receive calls. Today on mto?
