What Is a Fax?

Fax is the fastest growing non-phone telecommunication business in the past two decades. The still images recorded on the paper, such as text, graphics, photos, etc., are scanned and photoelectrically converted into electrical signals, which are transmitted to the destination through various channels. At the receiving end, a series of inverse transformation processes are used to obtain and send the original A communication method similar to a copy of a record is called a fax.

Fax (fax, short for facsimile, sometimes called telecopying) refers to the transmission of scanned printed materials (text or images) by telephone. Usually the telephone line is connected to a printer or other output device. The original document is scanned by the facsimile machine and converted into a bitmap file, and the facsimile machine treats the transmission content (text or image) as a separate determined image. In this digital form, information is transmitted as an electrical signal through the telephone system. The machine receiving the fax restored the code image and printed a copy of that document. ^[1]

The facsimile machine decomposes the originals to be sent into a number of tiny units (called pixels) through an optical scanning system in the prescribed order, and then converts the brightness information of these tiny units into electrical signals in order from the photoelectric conversion device. It is sent to the channel after modulation. After the receiver amplifies, decodes, or demodulates the received signal,

Fax is a PSTN-based telecommunication signal that relays fax signals through the device. Recently, due to the rapid development of science and technology, electronic Internet fax has gradually become a new generation communication tool replacing fax machines. (For details, please refer to "History of Fax Communication").

Fax communication is a communication method that uses scanning and photoelectric conversion technology to transmit static images such as text, images, photos, etc. from the sender to the receiver through wired or wireless channels, and reproduces the original still image in the form of records at the receiver.

1843 American physicist

A device that can implement fax communication functions is called a fax machine .

How fax works

The working principle of the facsimile machine is very simple, that is, the document to be sent is scanned first and converted into a series of black and white dot information, which is then converted into an audio signal and transmitted through a traditional telephone line. When the receiving fax machine "hears" the signal, the corresponding dot information will be printed out, so that the receiving party will receive a copy of the original document sent. However, this fax machine prints differently after receiving the signal, and their working principles are basically different in these aspects.

Fax operation method

You can first look at the instruction manual and simply explain. Insert the written article or a document gently into the fax machine's file input port, dial the fax number of the other party, and press "Start" (there is "Send") after the other party answers. Just click the button.

Here is a general way to send faxes:

1. Insert the handwritten letter paper first and hear a "drop" gently;

2. Pick up the handset, play the other party's number, and wait for the signal tone;

3. Press the fax key and hang up.

The main fax technology

There are scanning technology, recording technology, synchronous in-phase technology, and transmission technology. The facsimile communication process includes scanning, photoelectric conversion, signal scanning, image signal transmission, recording conversion, receiving scanning and synchronous in-phase.

Fax computer internet fax

With the development of computer network technology, office methods have been expanded, and the limitations of people's office space have been liberated. Similarly, the facsimile also began the space liberation movement. People use the computer network to digitalize and mail faxes, so that no matter where they are, as long as they can access the Internet, they can receive faxes. The main domestic fax servers are OceanFax, AOFAX, coFax, EastFax, myFAX, TraFax, WaveFax, etc. ^[3]