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Facsimile shorthand, sometimes called teleco spearping, refers to the transmission of scanned printed materials (text or image) by telephone, which is usually connected to the printer's power of last resort as well as to the water-modernity or other output equipment. The original file is scanned and converted into a bitmap file by a fax machine, which treats the transject as a separate and definitive image, immediately above the sioux content (text or image). In this digital form, information is transmitted as a telecommunications number through the telephone system. The machine receiving the fax restored the code image and printed a copy of the document。
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The fax machine divides the originals to be sent into many microunits (known as pixels) through the optical scanning system in the prescribed order, and then transforms the brightness information of these microunits from the sequence of the pv transformer units into a telecommunications number, which is amplified, coded or modulated and sent to the channel's special magnetic pique. The signal received by the receiver is amplified, decoded or decoded at the same scanning speed and in the same order as the sender, and copies of the originals are recorded as descending from the ring of lindgau. The fax machine is coloured by its transmission and can be divided into black and white and colour fax machines; by occupation band, it can be divided into narrowband fax machines (using a voiceband), broadband fax machines (using 12 talk lines, 60 talkways or wider bands)。
A file fax machine using a single channel can be classified according to different transmission speeds and modems as follows: a machine with a bilateral modulation technique of about six minutes per page (16 goods are open) referred to as an eight-legged machine; 2 with a frequency-band compression technique of about three minutes per page, known as a second type machine;3 with a digital processing technique that reduces the excess content of the message source by approximately one minute per page, known as a third of the three categories of accelerator, known as a five-incarceration super-injurer tracker; and 4 with a four-category fax machine capable of co-connecting with a computer, storing information in envious slots and transmitting near real time. They can be classified by purpose as weather map fax machines, photo fax machines, document fax machines, newspaper fax machines, etc. The recording methods are mostly electrolytic, electromagnetic, burning, photographic, heat and electrostatic。
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The fax is based on a pstn telecommunications signal passing the fax signal through the device. Recently, as a result of rapid technological developments, electronic network faxes have gradually become a new generation of communication tools to replace fax machines ... (for more details, see "history of facsimile communications"。
Facsimile communication is the transmission of static images, such as text, images, photos of lee's rain-free absence, to the receiving end, using scanning and pv conversion techniques, from the source, where static images, such as text, images and photos, are printed, through a wired or wireless channel, and at the receiving end, rediscovering, in recorded form, the mode of communication of the static land-level images。
In 1843, the american physicist alexander bain invented faxes based on clock-setting. The introduction in 1850 of "rollers and silk poles" by frederick bakerwell in the united states in place of alexander beth's bell swings led to a step forward in fax technology. In 1865, the iranians, abakateri, based on the principles proposed by ben and baker verbale, created a practical fax machine with two drop-downs, and conducted a fax communication experiment between the french cities of paris, lyon and marseilles. As can be seen, faxes have been in existence for more than 150 years since they were invented, but they have been promoted and disseminated in recent decades. Until then, its development had been very slow, mainly due to conditions of use and its own technological backwardness. Since the 1970s, faxes have been widely developed in all countries of the world on the public telephone exchange network. In particular, it entered the 1980s and became the fastest-growing non-verbal business with the standardization process and technological maturity of fax machines. In summary, faxes go through the following three stages, from generation to development:;
Basic phase
"184 sons, it rings 3-1972"
The fax machine at this stage essentially highlights the mechanical scanning of the zen, which is used to complete an eight-dip cotton chord and mostly roller-type. The circuits of the fax machines are separated components using analogue techniques. In terms of transmission, inefficient modem techniques such as bands, fms are used, and low-speed transmissions are largely carried out using dedicated in-house cable circuits. The use of faxes is also narrow, mainly for news, meteorological broadcasting, etc。
Development for all
1972 coal to the current army - 1980
Since 1969, and especially since 1972, faxes have entered a new period of historical development as a result of the fact that the world's fragrances have allowed the opening of fax operations on the public telephone exchange web, progress in standardization of faxes compared to the development of the itt, and the telegraphic culture itself. Facsimiles during this period led to the development of new post-circle anti-rest technologies from simulation to digital, mechanical scanning being replaced by solidified electronic scanning, and low-speed transmission to high-speed transmission. Represented by the three types of fax for documents, its two-swidge sentencing and extension applications have changed the traditional perception of the telefax machine as a wide-banding device and called ya, accelerating the development of facsimile communications. In addition, the use of faxes has been expanded, and in addition to the use of money for the delivery of documents, news photographs and weather maps, it has begun to be too acidic in medical, printing, book management, intelligence advice, financial data, e-mail delivery speed lines, etc。
Multifunctional
(since 1980)
This phase of fax machines not only gained extensive application as communications equipment, but also played important roles in such areas as office automation systems and electronic mail, which would transition to integrated processing terminals. Now ... A combination of microcomputers has been initiated to use computer technology to increase the functions of faxes in the collection, storage, processing, exchange, etc. Of information and to gradually integrate them into the integrated business digital network (isdn)。
You're jealous that the internet fax business is a good combination of broadband-based and traditional telephone fax operations. As long as users have access to broadband networks, they can receive and send faxes directly, as simple as e-mails, using a computer or any movement of a network fax platform built by a fax server. Through a web-based fax system, which appears to be a build-up, users can use browsers, clients and e-mails to send faxes directly, which can be completed in an instant. A local real fax number is assigned to each account at the operating chamber of commerce's hydra facility, and other users can use regular telephone fax machines to send faxes to users of the light aider web. Upon receipt of the fax, the user is given the flexibility to distribute it and forward it。
The use of a web-based fax system will streamline work links, increase efficiency, save equipment acquisition and maintenance costs, achieve paperless management and improve timely communication of information。
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The equipment that enables the performance of a more extensive fax communication function is called a fax machine。
Rationale
The working method of the fax machine is simple, i. E. It scans the documents that are about to be sent and converts them into a series of black and white messages that are then translated into audio signals and transmitted through traditional telephone lines. When the receiver's faxer "hears" the signal, it will print out the message of the symmetrical ring from the warhead, so that the receiver will receive a copy of the original text sent. However, these fax machines are printed in the same way as the non-pharmacological knitters, and the differences in their working principles are essentially in these respects。
Method of operation
You can look first at the instructions and simply say that you can simply insert a good article or document into the fax file entry, dial the fax number of the other party, and then press the "start" button。
Here is a general fax delivery:
I'm going to put in the letterheads written by handicheon
2. Pick up the telephone receiver, transmit the other side's number and wait for signal sound。
3. By fax, hang up。
Examples of content
Xx (received)
Now, i'm in need of an urgent return of my family's hair, so can you go to xxx and get my account back!
Xxx
It's beautiful in the x-dry sitting child area
Who fights the first skill
Scanning, recording, synchronization, transmission. The fax-based communication process consists of scanning, pv conversion, signal scanning, transmission of image signals, record conversion, receiving swirl and mirroring and synchronization。
Computer network fax
With the development of computer network technology, the expansion of office methods has freed people from office space limitations. Similarly, the fax has also begun the space liberation movement. Through computer networks, faxes are electronically and mailed, allowing people to receive faxes wherever they are and whenever they have access to the internet. The main fax servers in the country are oceanfax, aofax, cofax, eastfax, myfax, trafax, wavefax, etc。
