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I would like to share with you what devices must be used when personal computers are connected to the Internet by dial-up. I believe most people do not know much about it, so share this article for your reference. I hope you can learn a lot after reading this article, let's learn about it!

The device that must be used when a personal computer connects to the Internet in dial-up mode is a "modem"; a "modem" is an electronic device that can realize the modulation and demodulation functions needed for communication. it is generally composed of a modulator and a demodulator; the function of a "modem" is to be a "translator" of analog and digital signals.

Operating environment of this article: windows7 system, DELL G3 computer

What is the device that must be used when a personal computer is dialed to the Internet?

The device that must be used when a personal computer is dialed to the Internet is a modem.

One of the key hardware equipment needed to connect PC to Internet through the telephone line is the modem (Modem) that connects the telephone line with the computer. Its function is to convert the analog signal transmitted on the telephone line into a digital signal (demodulation) that the computer can recognize and transmit it to the computer. At the same time, the digital signal transmitted by the computer can be converted into an analog signal (modulation) that can be transmitted on the telephone line and sent to the telephone line.

Related introduction:

Modem is the abbreviation of Modulator (modulator) and Demodulator (demodulator), which is called modem in Chinese. According to the homonym of Modem, modem is called "cat" affectionately. It is a kind of electronic equipment which can realize the modulation and demodulation function needed for communication. It generally consists of a modulator and a demodulator. At the transmitting end, the digital signal generated by the computer serial port is modulated into an analog signal that can be transmitted through the telephone line; at the receiving end, the modem converts the analog signal input to the computer into a corresponding digital signal and sends it to the computer interface. In personal computers, modems are often used to exchange data and programs with other computers, and to access online information service programs.

The so-called modulation is to convert the digital signal into the analog signal transmitted on the telephone line; demodulation is to convert the analog signal into digital signal. Collectively known as modems.

The modem is called MODEM in English, and its function is to translate both analog and digital signals. There are two kinds of electronic signals, one is "analog signal" and the other is "digital signal". The telephone lines we use transmit analog signals, while PCs transmit digital signals. So when you want to connect your computer to the Internet through a phone line, you have to use a modem to "translate" two different signals. After connecting to the Internet, when the PC sends information to the Internet, because the telephone line transmits an analog signal, the digital signal must be "translated" into an analog signal by a modem before it can be transmitted to the Internet. This process is called "modulation". When the PC gets the information from the Internet, because the information transmitted from the Internet through the telephone line is all analog signals, so if the PC wants to understand them, it must use the modem as a "translation", a process called "demodulation". Generally speaking, it is called "modulation and demodulation".

The above is all the contents of the article "what devices must be used when a personal computer connects to the Internet by dialing up". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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