Neutral Direct-Current Telegraph System
Versandkostenfrei!
Versandfertig in 6-10 Tagen
23,99 €
inkl. MwSt.
PAYBACK Punkte
12 °P sammeln!
High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Telecommunication is the transmission of messages over significant distances for the purpose of communication. In earlier times, telecommunications involved the use of visual smoke signals, semaphores, signal flags, the optical heliograph, or audio coded messages sent by drumbeats, messages sent with lung-blown horns, or messages sent by whistles, for example. In the modern age of electricity and electronics, telecommunications has typically involved the use of electric means such as the telegraph, the tele...
High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Telecommunication is the transmission of messages over significant distances for the purpose of communication. In earlier times, telecommunications involved the use of visual smoke signals, semaphores, signal flags, the optical heliograph, or audio coded messages sent by drumbeats, messages sent with lung-blown horns, or messages sent by whistles, for example. In the modern age of electricity and electronics, telecommunications has typically involved the use of electric means such as the telegraph, the telephone, and the teletype, developed in fiber optics, and/or the Internet. The first breakthrough into modern electrical telecommunications came with the development of the telegraph during the 1830s and 1840s. The use of these electrical means of communications exploded into use on all of the continents of the world during the 19th century, and these also connected the continents via cables on the floors of the ocean. These three systems of communications all required the use of conducting metal wires.
