TC514V2 | modem | TC820-1 | TC520 3BSE001449R1 | TC512V1 3BSE018059R1

Model: TC514V2

Category: Modem

Express: SF Express

Delivery time: 3-5 days/week

Warranty: 365 days

The TC514V2 Modem (Modem) is a computer hardware, its main function is to convert the computer’s digital signals into analog signals that can be transmitted along ordinary telephone lines or cables, and at the receiving end to convert these analog signals back to digital signals. Here is a detailed explanation of modems:

1. Basic definition and functions

TC514V2 Modem is short for Modulator (modulator) and Demodulator (demodulator), and it is affectionately called “cat” according to the homophony of modem.

It is an electronic device capable of achieving the modulation and demodulation functions required for communication, consisting of a modulator and a demodulator.

At the sending end, the modem modulates the digital signal generated by the computer’s serial port into an analog signal that can be transmitted over a telephone line or cable.

At the receiving end, the modem converts the input analog signal into the corresponding digital signal and sends it to the computer interface.

Second, the working principle

Modulation: The process by which the TC514V2 converts a digital signal into an analog signal for transmission over a telephone line or cable.

Demodulation: The process of converting an analog signal back to a digital signal so that a computer can understand and process it.

Three, components

The modem consists of sending, receiving, control, interface, control panel and power supply.

4. Application field

In personal computers, the TC514V2 modem is often used to exchange data and programs with other computers, as well as to access online information service programs.

It is widely used in modern communication technology, including network connection, data transmission and remote monitoring.

V. Historical development

It was originally developed for the semi-automatic Ground Air Defense System (SAGE) of the 1950s to connect terminals, radar stations, and command and control centers at different bases.

In 1958, AT&T released the first commercial modem, the Bell 103, capable of 300 bit/s transmission speeds.

Subsequently, technology continued to advance, and the transmission speed and data processing power of modems were significantly improved.