You, Me, Electricity

Before our trip we want to explain you some about “cellular phone communication”.

The cellular phone communication is that one in which the phones aren’t connected with electric cables, in which the message is send through the air in from of electromagnetic waves.

It has two parts: a communication network, which consists of some aerials around the world, and the terminals or mobile phones, which allow the access to the network.

Each operator divides the area in some spaces, which are called cell. In each cell there is a base transceiver station, which is an aerial that can emit and receive in the said area. They use some set of ten channels, which have different frequencies, fact that allows that a lot of people can communicate at the same time.

When a phone makes a call it connects with the network switch of the nearest base transceiver station that belongs at his operator network (Movistar, Vodafone, Orange…).

Then the network switch search the addressee in the base transceiver station network since find the base transceiver station in which this stay and connects the two base transceiver stations calling the recipient phone. If the recipient accepts the call it puts in contact both.