{"id":195,"date":"2022-01-09T08:52:53","date_gmt":"2022-01-09T07:52:53","guid":{"rendered":"http:\/\/yb-isn.fr\/snt\/?p=195"},"modified":"2022-01-09T15:30:23","modified_gmt":"2022-01-09T14:30:23","slug":"du-telegraphe-a-internet","status":"publish","type":"post","link":"https:\/\/yb-isn.fr\/snt\/?p=195","title":{"rendered":"Du t\u00e9l\u00e9graphe au t\u00e9l\u00e9phone filaire"},"content":{"rendered":"\n<iframe loading=\"lazy\" width=\"211\" height=\"158\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/LKGkmbz57ds\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"><\/iframe>\n\n\n\n<p>Les messages envoy\u00e9s par t\u00e9l\u00e9graphie  sont des t\u00e9l\u00e9grammes. Les  lettres du message sont cod\u00e9es par des impulsions \u00e9lectriques.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/histoire.orange.com\/wp-content\/uploads\/sites\/33\/2019\/01\/emetteur-morse.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p>exemple d&rsquo;un SOS cod\u00e9 en Morse sous forme de signal \u00e9lectrique.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-19.png\" alt=\"\" class=\"wp-image-169\" width=\"247\" height=\"59\" srcset=\"https:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-19.png 988w, https:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-19-300x72.png 300w, https:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-19-768x184.png 768w, https:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-19-360x86.png 360w\" sizes=\"auto, (max-width: 247px) 100vw, 247px\" \/><\/figure>\n\n\n\n<iframe loading=\"lazy\" width=\"211\" height=\"158\" src=\"https:\/\/www.youtube.com\/embed\/_J8YcQETyTw\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"><\/iframe>\n\n\n\n<p>Invention du t\u00e9l\u00e9phone en 1876 est attribu\u00e9e \u00e0 Graham Bell. La premi\u00e8re ligne t\u00e9l\u00e9phonique date de 1880. entre Boston et Rhode Island<br>En 1912 : 12 millions de postes t\u00e9l\u00e9phoniques dans le monde<br>Le premier lien transcontinental est possible en 1915 gr\u00e2ce aux progr\u00e8s de l&rsquo;\u00e9lectronique et l&rsquo;amplification des signaux en particulier.<\/p>\n\n\n\n<p>En 1950, premi\u00e8re liaison t\u00e9l\u00e9phonique sous-marine entre Key West (Floride, \u00c9tats-Unis) et La Havane (Cuba). Sa capacit\u00e9 est de 24 circuits et chacun des deux c\u00e2bles contient quatre r\u00e9p\u00e9teurs.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-20.png\" alt=\"\" class=\"wp-image-175\" width=\"184\" height=\"185\" srcset=\"https:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-20.png 368w, https:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-20-300x300.png 300w, https:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-20-150x150.png 150w, https:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-20-269x270.png 269w\" sizes=\"auto, (max-width: 184px) 100vw, 184px\" \/><figcaption>ptt24<\/figcaption><\/figure>\n\n\n\n<p>Pour relier les abonn\u00e9s entre eux, la commutation des lignes est faite manuellement au central t\u00e9l\u00e9phonique par des op\u00e9ratrices avec des cordons munis de fiches jack. Il s&rsquo;agit de la commutation de circuit manuelle.<\/p>\n\n\n\n<p>Le centrale de Macon en 1968 avant son passage \u00e0 la commutation automatique. Le premier centrale automatique date de 1913 \u00e0 Nice. Il devient enti\u00e8rement automatique en France en 1979.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-22.png\" alt=\"\" class=\"wp-image-180\" width=\"219\" height=\"140\" srcset=\"https:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-22.png 876w, https:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-22-300x191.png 300w, https:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-22-768x490.png 768w, https:\/\/yb-isn.fr\/snt\/wp-content\/uploads\/2022\/01\/image-22-360x230.png 360w\" sizes=\"auto, (max-width: 219px) 100vw, 219px\" \/><\/figure>\n\n\n\n<video width=\"211\" height=\"158\" controls=\"\">\n  <source src=\"http:\/\/yb-isn.fr\/ina-macon.mp4\" type=\"video\/mp4\">\n<\/video>\n\n\n\n<p> Les c\u00e2bles sous-marins \u00e0 fibre optique sont apparus en 1988 avec la pose du c\u00e2ble transatlantique TAT-8 qui dispose de 40000 circuits t\u00e9l\u00e9phoniques.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les messages envoy\u00e9s par t\u00e9l\u00e9graphie sont des t\u00e9l\u00e9grammes. Les lettres du message sont cod\u00e9es par des impulsions \u00e9lectriques. exemple d&rsquo;un SOS cod\u00e9 en Morse sous forme de signal \u00e9lectrique. Invention du t\u00e9l\u00e9phone en 1876 est attribu\u00e9e \u00e0 Graham Bell. La&hellip;&nbsp;<a href=\"https:\/\/yb-isn.fr\/snt\/?p=195\" class=\"more-link\">Lire la suite<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-195","post","type-post","status-publish","format-standard","hentry","category-non-classe"],"_links":{"self":[{"href":"https:\/\/yb-isn.fr\/snt\/index.php?rest_route=\/wp\/v2\/posts\/195","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yb-isn.fr\/snt\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yb-isn.fr\/snt\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yb-isn.fr\/snt\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yb-isn.fr\/snt\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=195"}],"version-history":[{"count":19,"href":"https:\/\/yb-isn.fr\/snt\/index.php?rest_route=\/wp\/v2\/posts\/195\/revisions"}],"predecessor-version":[{"id":232,"href":"https:\/\/yb-isn.fr\/snt\/index.php?rest_route=\/wp\/v2\/posts\/195\/revisions\/232"}],"wp:attachment":[{"href":"https:\/\/yb-isn.fr\/snt\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yb-isn.fr\/snt\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=195"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yb-isn.fr\/snt\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}