telephone is a device of telecommunications drawn to transmit sounds by means of signs eléctricos. He was invented about 1860 by Antonio Meucci that called it teletrophone, as it recognized the Congress of United States in the resolution 269, of June 15, 2002. Before this resolution, its invention was generally attributed to Alexander Graham Bell. The first registered public demonstration of the invention of Meucci had room in 1860, and he/she had its description published in a newspaper of Italian language of New York.
It is defined as an apparel eletroacústico that allows the transformation, in the point transmitter, of acoustic energy in electric energy and, in the receiving point, we will have the transformation of the electric energy in acoustics, allowing the change of information this way between two or more subscribers. It is logical that, there to be success in that communication, the apparels need to be tied up to several equipments, that form a central one phone. á categories different from telephone receivers, depending on the used technology.
* The Telephone Analogical floodgate just voice transmission and sinalização frequencies. * The Telephone without thread uses radiofrequências of short reach for transmission of the voice for a base that makes the conversion for the analogical or digital way. * The Digital Telephone increases a layer for the transmission of data THE layer of data it allows the traffic of information about the connection in course or to send information for interagir with a Pabx, for example. A cellular telephone (in Brazil and in Mozambique) or telemóvel (in Portugal) it is a communication apparel for waves electromagnéticas that allows the transmission voice bidireccional and usable data in a geographical area that one finds divided in cells, each one of them served by a transmissor/receptor.
Telephone cellular, or simply " cellular " (cellular plural), it is the designation used in Brazil and in Mozambique. In Portugal, these apparels became designated at its time as " telemóvel " (plural telemóveis), a simplification of " mobile " telephone. However, the designation ' he/she Telephones Cellular ' it stays as technical designation.
There are different technologies for the diffusion of the waves eletromagnéticas in the cellular telephones, based on the compression of the information or in its distribution: in the first generation (1G) (the analogical, developed in the beginning of the eighties), with the systems NMT and AMPS; in the second generation (2G) (digital, developed in the end of the eighties and beginning of the nineties): GSM, CDMA and TDMA; in the second generation and stocking (2,5G) - an evolution to for 2G (with significant improvements in capacity of transmission of data and in the adoption of the technology of packages and not more commutation of circuits) it uses a superior technology to GPRS, EDGE, also uses standard HSCSD and 1XRTT; in the third generation (3G) (digital, with more resources, in development from the end of the nineties), UMTS and W-CDMA.
The industry classifies the systems of cellular telephony in generations: the first generation (1G) analogical; the second generation (2G), already digital and in intense use in Brazil; Monday and half generation (2,5G), with significant improvements in capacity of transmission of data and in the adoption of the technology of packages and not more commutation of circuits; the third generation (3G), still in initial experiences in Japan and in Europe. It is already in development for 4G (fourth generation).
Similar apparels based on the radio were already used by the policemen in Chicago in the decade of thirty, dentre other technologies. The fixed telephone, or simply telephone, it is designated like this by the companies operators of the systems of telecommunications for the traditional system of telephony, called of telephony it fastens, composed basically of metallic phone cables and optical fibers, in compensation of that denominated system of cellular telephony. In that last one, the communication among the central (phone) of cellular commutation and the mobile station (he/she telephones cellular or telemóvel), he/she gives him through frequencies of radio. Consequently, a differentiation exists among the two systems for the type of the access net. RECORD is the acrônimo of " Adapter for Analogical " Telephone (Analog Telephone Adaptor). These devices serve as that of adaptation interface so that you telephone conventional (analogical) they can be connected to a net IP. This allows the accomplishment of calls VoIP. You Tie them they work as a gateway of VoIP, could have of one to four doors FXS for the connection of telephones and an or two doors Ethernet. The term telecartofilia designates the act of collecting Cards of Telephone.
With the coming of the modern technology of the phone cards, that substituted the coins and, in Brazil, the old phone records, the people began to collect them, separating them and classifying them for countries, categories, values, illustrative themes, changing them and same marketing them.
Now, some pieces reach expressive values in that market, what stimulates people to collect them as investment form. Among the factors that determine the valorização certain pieces they meet the reduced circulation, a specific series, production defects, personalities of the moment, sporting, cultural events, etc.
The telecartofilia is a colecionismo form in expansion, with a great number of followers. That can be explained due to that the phone cards are cheap, easy to obtain and to maintain, with varied themes and attractive illustrations.