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This article mainly introduces what the ext interface in the computer means. It is very detailed and has certain reference value. Friends who are interested must finish reading it.

The ext interface is an external telephone port. There are two telephone line interfaces at the back of the fax machine, one is the LINE port, which is connected to the phone, and the other port is the EXT port, from which an extension call can be connected with another telephone line.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

There are two telephone lines behind the fax machine. One is the LINE port, which is used to answer the phone and connect to the wire Jack. The other port is the EXT port, which is the external telephone line port, from which an extension call can be connected with another telephone line.

If the two ports are connected incorrectly, you will not be able to use the fax function.

Extended data:

Fax technology was born as early as the 1840s, 30 years before the invention of the telephone. It was invented in 1843 by an English inventor named Alexander Bain.

However, facsimile communication is a slowly developing technology in the field of telecommunications, which did not mature until the 1920s and developed rapidly after the 1960s. In recent years, it has become one of the most widely used communication tools.

The common fax machines on the market can be divided into four categories:

1. Thermal paper fax machine (also known as web fax machine)

2. Laser ordinary paper fax machine (also known as laser all-in-one machine)

3. Inkjet ordinary paper fax machine (also known as inkjet all-in-one)

4. Heat transfer ordinary paper fax machine.

The working principle of the fax machine is very simple, that is, the file that is about to be sent is scanned and converted into a series of black and white spot information, which is then converted into audio signals and transmitted through traditional telephone lines. After the receiver's fax machine "hears" the signal, it will print out the corresponding point information, so that the receiver will receive a copy of the original sent document.

The above is all the content of this article "what is the meaning of ext interface in computer?" Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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