lundi 14 novembre 2011

The mobile telephony (GSM)

A cellular network is a communication network in which the user is freed from the constraints of location or movement. The cellular mobile network makes it possible to establish and maintain communication to the user regardless of its location and its speed of movement within the area of ​​network coverage. Communications may be local, long distance or international.
One of the most significant advances made ​​in Africa in general is the rapid development of mobile telephony. The mobile phone has become an inescapable reality. It is in many places the only means of access to telecommunications. It is a relatively new field. There are several standards for cellular networks around the world. The European standard GSM (Global System for Mobiles) U.S. standards TDMA (Time Division Multiplex Access) and CDMA (Code Division Multiplex Access) and standard PDC (Personal Digital Cordless) in Japan. These four standards are inconsistent in that you have to buy a different phone to switch from one standard to another. But they remain consistent in that two parties using different standards can still communicate. The standard adopted and existing in Benin is GSM. This choice is beneficial to customers because they can change operator without changing equipment. In addition the adoption of GSM as a standard single avoids confrontation standards (standards war).

Benin Telecoms SA has installed in Benin in 1995 a mobile network type AMPS (advanced mobile phone system, analog cellular standard American). The system operates within a radius of 150 km, and covers the area from Porto-Novo to Ouidah through Cotonou.
  
 











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