THE HISTORY
The mobile phone back to the beginning of World War II, which already saw that it was necessary distance communication, that is why the company created a team called Motorola Talkie Handie H12-16, which is a device that allows contact with the troops via radio waves whose frequency band at the time did not exceed 60 MHz.
This was the beginning of a technology that more progress has, although still in search of additions and improvements.
During this period, and 1985 began to refine and shape the characteristics of this revolutionary new system because it allowed to communicate at a distance. So in the 1980s it was creating a team that occupied similar resources to Handie Talkie but was intended for people who were usually big business and should be reported, this is where setting up the phone and dials a milestone in the history of wireless components and that this team could talk to anytime and anywhere.
Over time, mobile telephony became more accessible to the public, to the extent that any normal person, even a child could acquire a terminal
The mobile phone back to the beginning of World War II, which already saw that it was necessary distance communication, that is why the company created a team called Motorola Talkie Handie H12-16, which is a device that allows contact with the troops via radio waves whose frequency band at the time did not exceed 60 MHz.
This was the beginning of a technology that more progress has, although still in search of additions and improvements.
During this period, and 1985 began to refine and shape the characteristics of this revolutionary new system because it allowed to communicate at a distance. So in the 1980s it was creating a team that occupied similar resources to Handie Talkie but was intended for people who were usually big business and should be reported, this is where setting up the phone and dials a milestone in the history of wireless components and that this team could talk to anytime and anywhere.
Over time, mobile telephony became more accessible to the public, to the extent that any normal person, even a child could acquire a terminal
What is it?
The mobile phone is a wireless device allows access to the network of cellular or mobile. It is called cell in most latin american countries due to the fact that the service works through a network of cells, where each relay antenna signal is a cell, although there are also mobile telephone networks satellite. Its main characteristic is its portability, which allows you to communicate from almost anywhere.
From the century, mobile phones have acquired features that go far beyond simply just call or send text messages, you could say have been unified (not replaced) with various devices such as PDA, camera, electronic calendar, alarm clock, calculator, micro-projector, GPS or multimedia player and able to perform many actions on a small portable device that takes virtually everyone in developed countries.
OperationTelephone communication is made possible by the interconnection between mobile stations and public.
According to the bands or frequencies which operates the mobile, can operate in one part or another of the world.
Mobile telephony is a combination of a network of transmitting stations, receiving stations (repeaters, base stations or BTS) and a series of telephone switching 1st and 5th level (MSC and BSC, respectively), which enables communication between portable telephone terminals (mobile phones) or between mobile terminals and fixed network phones traditional.
The mobile phone is a wireless device allows access to the network of cellular or mobile. It is called cell in most latin american countries due to the fact that the service works through a network of cells, where each relay antenna signal is a cell, although there are also mobile telephone networks satellite. Its main characteristic is its portability, which allows you to communicate from almost anywhere.
From the century, mobile phones have acquired features that go far beyond simply just call or send text messages, you could say have been unified (not replaced) with various devices such as PDA, camera, electronic calendar, alarm clock, calculator, micro-projector, GPS or multimedia player and able to perform many actions on a small portable device that takes virtually everyone in developed countries.
OperationTelephone communication is made possible by the interconnection between mobile stations and public.
According to the bands or frequencies which operates the mobile, can operate in one part or another of the world.
Mobile telephony is a combination of a network of transmitting stations, receiving stations (repeaters, base stations or BTS) and a series of telephone switching 1st and 5th level (MSC and BSC, respectively), which enables communication between portable telephone terminals (mobile phones) or between mobile terminals and fixed network phones traditional.
PARTS AND THEIR FUNCTIONS
Antenna: Used to receive signals from the telephone service Provedor.
Display: Allows you to display all the phone functions.
Keyboard: Allows you to access the phone functions so as to make calls.
Microphone: Used for communicating with other phones by voice.
Speaker: Used to listen to the conversation that is ongoing, also serves to listen to content as ringtones phone, music, etc ...
Battery: Allows you to keep your computer with enough power to operate.
IC: Well, the phone is the brain where all information and functions of the stored phone
Display: Allows you to display all the phone functions.
Keyboard: Allows you to access the phone functions so as to make calls.
Microphone: Used for communicating with other phones by voice.
Speaker: Used to listen to the conversation that is ongoing, also serves to listen to content as ringtones phone, music, etc ...
Battery: Allows you to keep your computer with enough power to operate.
IC: Well, the phone is the brain where all information and functions of the stored phone
HOW A CELL PHONE The big idea of the cellular system is the division of the city into small cells or cells. This idea allows the reuse of frequencies through the city, bringing thousands of people can use phones at the same time. In a typical analog phone system in the United States, the company receives about 800 frequencies to use in each city. The company divides the city into cells. Each cell usually has a size of 26 square kilometers. The cells are usually designed as hexagons (six-sided figures), in a grid of hexagons. To view the graph select the "Download" top menu Each cell has a base station that consists of a tower and a small building containing the radio equipment. Each cell in an analog system uses one-seventh of voice channels available. That is, a cell, over the six cells that surround a hexagonal arrangement, each using one-seventh of the available channels so that each cell has a unique set of frequencies and there are no collisions: A cellular service provider typically gets 832 radio frequencies for use in a city. Each cell phone uses two frequencies per call, so there are typically 395 voice channels per carrier signal. (The other 42 frequencies are used as control channels). Therefore, every cell has about 56 voice channels available. In other words, any cell, 56 people can talk on their cell phones simultaneously. With digital transmission, the number of available channels increases. For example, the TDMA digital system can carry three times more calls per cell, about 168 channels available simultaneously. Cell phones have low-power transmitters inside. Many cell phones have two signal strengths: 0.6 watts and 3.0 watts (for comparison, most CB radios transmit at 4 watts.) Central station is also transmitting at low power. The low-power transmitters have two advantages: The transmissions from the central database and in the same cell phones do not leave it. Therefore, each cell can re-use the same 56 frequencies across the city. The power consumption of cell phone, usually battery operated, is relatively low. Low power means smaller batteries, which makes cell phones possible. The cellular approach requires a large number of bases or stations in a city of any size. A large city can have hundreds of towers. Every city needs a central office which handles all telephone connections to regular phones, and controls all the stations in the region
El sábado 7 de agosto en la mañana, el ejército realista desde Motavita inició su desplazamiento hacia Santafé de Bogotá. Su objetivo era llegar a la capital para unir sus fuerzas con las del virrey Sámano y organizar un frente militar contra Bolívar y el ejército libertador. Escogieron la vía por el Puente de Boyacá en el camino real, con dirección a la capital del Virreinato. Advertido de este movimiento, Bolívar ordenó la marcha de su ejército, también hacia el puente de Boyacá, dispuesto a tomarlo para impedir a Barreiro su desplazamiento hacia la capital granadina. 
Desde el alto de San Lázaro en Tunja, el Libertador y el estado mayor observaron los movimientos del Ejército realista. A las 10 de la mañana ordenaron impedir el paso por el Puente de Boyacá, en el cual confluyen los dos caminos: el de Samacá, utilizado por los realistas desde Motavita y el camino real, utilizado por los patriotas. 
Los soldados patriotas presionaron con heroísmo contra las fuerzas de Barreiro. La infantería patriota, con perfecta disciplina y asombrosa actividad militar, hizo un movimiento rápido y envolvente. Por su parte, el coronel Juan José Rondón con sus lanceros de Llano Arriba recibió la orden de atacar por el centro al ejército realista. Los lanceros de Rondón arremetieron con ímpetu a la infantería realista, que incapaz de resistir retrocedió en desorden. Un escuadrón de la caballería realista huyó por el camino de Samacá sin presentar resistencia. Asimismo, los patriotas aniquilaron al Batallón 2 de Dragones del ejército español. 
El coronel Barreiro siguió combatiendo a la defensiva. Trató de rehacer su infantería en otra altura, pero la rapidez de las tropas patriotas cerró aquel anillo de fuego, por lo cual la retaguardia realista, cercada por todas partes, tuvo que rendirse. Así mismo se rindió la vanguardia ante la fuerza militar de la patriota, con su comandante Santander, considerado el 'Héroe de Boyacá'. La batalla terminó a las 4 de la tarde del 7 de agosto de 1819. Murieron más de 100 realistas, entre ellos el coronel Juan Tolrá y el comandante Salazar, y 150 quedaron heridos. De los patriotas murieron 13 soldados, entre ellos el capellán de la vanguardia, Fray Ignacio Díaz, y 53 quedaron heridos.