What equipment is necessary when two computers use telephone lines to transmit data signals?

When two computers use telephone lines to transmit data signals, the necessary equipment is a modem; a modem is the abbreviation of modulator and demodulator, a kind of computer hardware that can translate the computer's digital signal into a readable Analog signals that are sent along a regular telephone line so that they can be received by another modem at the other end of the line.

When two computers use telephone lines to transmit data signals, the necessary equipment is modem.

Modem, the abbreviation of modulator and demodulator, is a kind of computer hardware that can translate the computer's digital signals into analog signals that can be transmitted along ordinary telephone lines, and these analog signals can be transmitted by the lines. Another modem on the other end receives it and translates it into a language the computer can understand. This simple process completes communication between two computers.

Modem is the abbreviation of Modulator and Demodulator. It is called modem in Chinese. According to the homophony of Modem, it is affectionately called "cat". It is a kind of device that can achieve communication needs. Electronic equipment with modulation and demodulation functions.

Generally consists of a modulator and a demodulator. At the sending end, the digital signal generated by the computer's 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 into 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 digital signals into analog signals transmitted on telephone lines; demodulation is to convert analog signals into digital signals. Collectively called a modem.

The English name for modem is MODEM, and its function is the "translator" of analog signals and digital signals.

There are two types of electronic signals, one is "analog signal" and the other is "digital signal". The telephone lines we use transmit analog signals, while the PCs transmit digital signals.

So when you want to connect your computer to the Internet through a phone line, you must use a modem to "translate" two different signals.

After connecting to the Internet, when the PC sends information to the Internet, since the telephone line transmits analog signals, a modem must be used to "translate" the digital signals into analog signals before they can be transmitted to the Internet. , this process is called "modulation".

When the PC obtains information from the Internet, since the information transmitted from the Internet through the phone line are all analog signals, if the PC wants to understand them, it must also use the "translation" of the modem. This process It's called "demodulation." Generally speaking, it is called "modulation and demodulation".

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