How was the telegram sent?

When making a telegram, the electric key makes or breaks the circuit, and the information is transmitted in the form of "dot" and "dash" codes. It takes 0. 1 sec to send a "dot" and 0.3 sec to send a "dash".

In this case, the electrical signal has only two states: there is current when the key is pressed, and there is no current when the key is not pressed. When there is current, it is called a mark, which is represented by the number "1", and when there is no current, it is called an empty number and is represented by the number "0". A "point" is represented by "1, 0" and a "stroke" is represented by "1, 1, 0".

The letters or numbers to be transmitted by Morse telegram are represented by dots and dashes in different orders, which is Morse code. The actual working speed of Morse telegraph machine is very low, with no more than 20 signals per second. In order to improve the speed of sending telegrams, teleprinters are widely used at present.

Extended data:

At the beginning of the 20th century, even ordinary people could communicate long distance by telegraph. At that time, the company responsible for telegraph communication set up telegraph offices in major cities across the country. Ordinary people can send a telegram to another distant city as long as they pay at the telegraph office. The cost is calculated according to the distance and the number of words in the telegram.

When the telegraph office at the other end receives the telegram, someone will send the printed telegram to the destination. As for major enterprises and governments, most of them have their own telegraph lines. With the popularization of telegrams, there are also organizations that transmit messages by telegraph, that is, news agencies now. Among them, Reuters 185 1 was founded in London and was one of the earliest news agencies.

References:

Baidu encyclopedia-telegram