Fax, called fax in English.
Fax, fax is a very important part of the world's fax industry, but it is also the most important part of the global economy. p>
The working principle of the fax machine: the working principle of the fax machine is very simple, that is, the first scanning will need to be sent to the document and converted into a series of black-and-white dots information, the information is then converted into an acoustic signal and transmitted through a traditional telephone line. The receiver of the fax machine "hear" the signal, the corresponding point of information will be printed out, so that the receiver will receive a copy of the original document sent. But the four types of fax machines print differently when they receive the signal, and the difference in how they work is basically in these areas.
The actual operation of the fax machine: you can look at the manual, simply put, you just write a good article or a document, gently inserted into the fax machine document input port, dial the other side of the fax number, the other side of the reply, press the "Start" (there is a "Send") button, done! ") button, done!
Fax draft: - friends and you are familiar with? If you are familiar with it, you can feel free to write -
XX (to)
I am now XXX (place name), due to the need to urgently transfer back to my account, you can go to the XXX place, to help me get back to the account? I would like to thank you in advance!
XXX (your name)
XXXX, XX month XX
Fax is the fastest growing non-telephone telecommunication service in the last two decades. Text, charts, photographs and other static images recorded on paper, through the scanning and photoelectric conversion, into electrical signals, transmitted through various types of channels to the destination, at the receiving end through a series of inverse transformation process, to obtain with the sending of a copy of the original similar records of the mode of communication, known as fax.
The main technologies of fax are: scanning technology, recording technology, synchronization technology, transmission technology. The communication process of fax includes scanning, photoelectric conversion, transmission of image signals, recording conversion, receiving scanning and synchronization.
Fax is based on the PSTN telecommunication signals through the equipment to relay fax signals. Recently, due to the rapid development of science and technology, electronic network fax has gradually become a new generation of communication tools to replace the fax machine.
The history of fax communication
Fax communication is the use of scanning and photoelectric conversion technology, from the sender of text, images, photographs and other static images through the wired or wireless channel to the receiving end, and the receiving end in the form of a record to reproduce the original static image of the communication mode.
In 1843, the American physicist Alexander Bess invented the pendulum.
In 1843, the American physicist Alexander Bess invented the facsimile based on the principle of the pendulum. Bakewell began to use the "roller and silk rod" device instead of Alexander Bain's pendulum. Bain's pendulum, so that the fax technology a step forward. 1865, the Iranian Abakateri according to Bain and Bakewell proposed principles, the manufacture of a practical fax machine, and in France, Paris, Lyon and Marseille and other cities between the fax communication experiments. It can be seen that since its invention, fax has a history of more than 150 years, but it is only in the last few decades that it has been promoted and popularized. Before that, its development was very slow, which was mainly limited by the conditions of use and its own backward technology. Since the beginning of the 1970s, the world's countries have been in the public telephone exchange network to open up the fax business, fax has been widely developed. Especially into the 80's, with the process of standardization of fax machines and the maturity of technology, it became the fastest growing a non-talking business. Summarize the fax from the emergence of the development of the following three stages;
(1) the basic stage (1843-1972)
This stage of the fax machine is basically mechanical scanning, and most of the use of drum scanning. The circuitry of the fax machine was partly analog technology with discrete components. In terms of transmission is the use of AM, FM and other low-efficiency modulation technology, and basically the use of dedicated wired circuits for low-speed transmission. At this time the application of fax is also very narrow, mainly for news, weather broadcasting and so on.
(2) development and popularization stage (1972-1980)
Since 1969, especially after 1972, as countries around the world have been allowed to open up the fax business in the public switched telephone network than the progress of the ITT standardization of fax, as well as the development of the fax technology itself, so that the fax into a new Historical development period. This period of fax technology from analog to digital development, mechanical scanning by solidification of electronic scanning instead of low-speed transmission to high-speed transmission development. To document fax three types of machines as a representative, its emergence and promote the application of the fax machine to change the traditional view of the fax machine, accelerating the development of fax communications. In addition, the scope of application of fax has also been expanded, in addition to the transmission of documents, news photos, weather maps, in the medical, printing, library management, intelligence consulting, financial data, e-post and other aspects of the application also began to be applied.
(3) multifunctional stage (after 1980)
This stage of the fax machine not only as a communication device has been widely used, but also in the office automation system and e-postal and other aspects of an important role, it will be transitioning to a comprehensive treatment of the terminal. Now... Has begun to combine with microcomputers, the use of computer technology to increase the fax in the information collection, storage, processing, exchange and other aspects of the function, and gradually integrated into the integrated services digital network (ISDN).