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Smoke signals and drums
- Early telecommunications included smoke signals and drums. Talking drums were used by natives in Africa, and smoke signals in North America and China. These systems were often used to do more than announce the presence of a military camp.
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Early telecommunications included smoke signals and drums. Talking drums were used by natives in Africa, and smoke signals in North America and China. These systems were often used to do more than announce the presence of a military camp.
The rise of the telephone changed the way we live, work and play, and contributed to the invention of television, computers, pagers, fax machines, e-mail, the Internet, online stock trading and more. Explore our timeline below highlighting just a few of these extraordinary leaps of innovation and invention.
Early telephones were technically diverse. Some of them used liquid transmitters which soon went out of use. Others were dynamic: their diaphragms vibrated a coil of wire in the field of a permanent magnet or vice versa.
Early months of 1879: The Bell Telephone Company is near bankruptcy and desperate to get a transmitter to equal Edison's carbon transmitter. 17 February 1879: Bell Telephone merges with the New England Telephone Company to form the National Bell Telephone Company.
Early Years. The telephone lines of the late 1870s and early 1880s, such as used to connect telephones to early telephone exchanges, were single iron or steel wires with ground returns. The wires were strung over aerial poles or occasionally roof supports, and attached to cross arms on the poles via glass insulators.
As it has since its early years, the telephone instrument is made up of the following functional components: a power source, a switch hook, a dialer, a ringer, a transmitter, a receiver, and an anti-sidetone circuit. These components are described in turn below.
A-1 Summarize the history of telecommunications, from ancient signaling methods like smoke signals and drum beating to modern-day technologies. A-2 Describe the inventions of the telegraph and telephone and the key contributors to the development of these technologies. A-3 Explain the role of submarine cables in the early transatlantic ...
