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22. Juli 2024 · History of the telephone. Actor portraying Alexander Graham Bell in a 1932 silent film. Shows Bell's second telephone transmitter ( microphone ), invented 1876 and first displayed at the Centennial Exposition, Philadelphia.
23. Juli 2024 · Ein Mobiltelefon, im deutschsprachigen Raum auch Handy, [1] früher auch Funktelefon, Antennentelefon, Handtelefon [2] oder GSM-Telefon (nach dem Mobilfunkstandard GSM ), in der Schweiz auch Natel genannt, ist ein tragbares Telefon, das über Funk mit dem Telefonnetz kommuniziert und daher ortsunabhängig eingesetzt werden kann.
5. Juli 2024 · Alexander Graham Bell, Scottish-born American inventor, scientist, and teacher of the deaf whose foremost accomplishments were the invention of the telephone (1876) and refinement of the phonograph (1886). He also worked on use of light to transmit sound, development of a metal detector, and heavier-than-air flight.
23. Juli 2024 · Peu à peu, le smartphone est passé de mobile intelligent à véritable centre nomade de nos vies numériques. Parce qu'il est décliné en centaines de modèles pour autant de tailles d'écrans ...
Vor 4 Tagen · Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.
21. Juli 2024 · mobile telephone, portable device for connecting to a telecommunications network in order to transmit and receive voice, video, or other data. Mobile phones typically connect to the public switched telephone network (PSTN) through one of two categories: cellular telephone systems or global satellite-based telephony.
10. Juli 2024 · Telecommunication, science and practice of transmitting information by electromagnetic means. Modern telecommunication centers on the problems involved in transmitting large volumes of information over long distances without damaging loss due to noise and interference.
