{"id":410,"date":"2012-11-17T10:24:45","date_gmt":"2012-11-17T12:24:45","guid":{"rendered":"http:\/\/efagundes.com\/openclass_networking\/?page_id=410"},"modified":"2022-01-16T17:51:05","modified_gmt":"2022-01-16T20:51:05","slug":"invencao-de-michael-pupin","status":"publish","type":"page","link":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/invencao-de-michael-pupin\/","title":{"rendered":"Inven\u00e7\u00e3o de Michael Pupin"},"content":{"rendered":"<p><a href=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide94.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2459\" data-permalink=\"https:\/\/efagundes.com\/networking\/sistema-telefonico\/invencao-de-michael-pupin\/slide9-5\/\" data-orig-file=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide94.jpg?fit=960%2C720&amp;ssl=1\" data-orig-size=\"960,720\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Slide9\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide94.jpg?fit=960%2C720&amp;ssl=1\" class=\"alignnone size-full wp-image-2459\" src=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide94.jpg?resize=960%2C720\" alt=\"Slide9\" width=\"960\" height=\"720\" srcset=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide94.jpg?w=960&amp;ssl=1 960w, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide94.jpg?resize=300%2C225&amp;ssl=1 300w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/a>Load coil \u00e9 um dispositivo colocado em um circuito de telefone entre a companhia telef\u00f4nica e o assinante para aumentar a voltagem e compensar a perda do sinal devido as pontes de circuitos.<\/p>\n<p>load coil \u00e9 um dispositivo indutivo que age como um filtro para a alta-freq\u00fc\u00eancia e deve ser removido se a linha for convertida para digital. Como servi\u00e7o digital deve estar pr\u00f3xima da casa do assinante as linhas anal\u00f3gicas ser\u00e3o eliminadas no futuro.<\/p>\n<p>Esta \u00e9 mais importante inven\u00e7\u00e3o de Michael Pupin, primeiro o entendimento te\u00f3rico e mais tarde a aplica\u00e7\u00e3o pr\u00e1tica que a atenua\u00e7\u00e3o dos campos eletromagn\u00e9ticos podem ser significantemente reduzida. O processo \u00e9 conhecido como \u201cPupiniza\u00e7\u00e3o\u201d.<\/p>\n<p>Essa descoberta permite que a conversa\u00e7\u00e3o telef\u00f4nica entre duas partes possa ser estendida antes de 32 km para dist\u00e2ncias ilimitadas, considerando os circuitos da esta\u00e7\u00e3o local.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Load coil \u00e9 um dispositivo colocado em um circuito de telefone entre a companhia telef\u00f4nica e o assinante para aumentar a voltagem e compensar a perda do sinal devido as pontes de circuitos. load coil \u00e9 um dispositivo indutivo que age como um filtro para a alta-freq\u00fc\u00eancia e deve ser removido se a linha for [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":394,"menu_order":8,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-410","page","type-page","status-publish","hentry"],"jetpack_shortlink":"https:\/\/wp.me\/P8yKGp-6C","jetpack-related-posts":[{"id":434,"url":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/wll-wire-local-loop\/","url_meta":{"origin":410,"position":0},"title":"WLL Wire Local Loop","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"\u00a0 A tecnologia WLL substitui, no todo ou em parte, os pares de cabos telef\u00f4nicos utilizados na conex\u00e3o do telefone do assinante at\u00e9 a central telef\u00f4nica. \u00c9 baseada em um terminal fixo que se comunica, via ondas de r\u00e1dio, com a central de telefonia p\u00fablica e que busca n\u00e3o utilizar\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide20","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide203.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide203.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide203.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide203.jpg?resize=700%2C400 2x"},"classes":[]},{"id":406,"url":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/estrutura-do-sistema-telefonico-ii\/","url_meta":{"origin":410,"position":1},"title":"Estrutura do sistema telef\u00f4nico (II)","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"Em 1890, era poss\u00edvel notar a presen\u00e7a das tr\u00eas principais partes do sistema telef\u00f4nico: as esta\u00e7\u00f5es de comuta\u00e7\u00e3o, os fios que ligavam os usu\u00e1rios \u00e0s esta\u00e7\u00f5es de comuta\u00e7\u00e3o (agora j\u00e1 operando com cabos de pares tran\u00e7ados, isolados e balanceados em vez de cabos abertos com retorno por terra) e as\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide7","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide74.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide74.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide74.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide74.jpg?resize=700%2C400 2x"},"classes":[]},{"id":396,"url":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/historia-do-telefone-i\/","url_meta":{"origin":410,"position":2},"title":"Hist\u00f3ria do telefone (I)","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"\u00a0 Samuel Morse, pintor e inventor, no dia 2 de dezembro de 1837, apresentou a um grupo de amigos a sua cria\u00e7\u00e3o: um circuito telegr\u00e1fico com o comprimento de 420 metros. Entre os que assistiram \u00e0 demonstra\u00e7\u00e3o estava Alfred Vail, rico propriet\u00e1rio de ferrarias, dotado de um not\u00e1vel tino comercial.\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide2","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide215.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide215.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide215.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide215.jpg?resize=700%2C400 2x"},"classes":[]},{"id":154,"url":"https:\/\/efagundes.com\/networking\/redes-geograficamente-distribuidas\/redes-x-25\/","url_meta":{"origin":410,"position":3},"title":"Redes X.25","author":"Eduardo Fagundes","date":"16\/11\/2012","format":false,"excerpt":"X.25 \u00e9 um padr\u00e3o de protocolo para comunica\u00e7\u00f5es para redes geograficamente distribu\u00eddas da International Telecommunication Union - setor de padroniza\u00e7\u00e3o de telecomunica\u00e7\u00f5es (ITU-T) que define como devem ser estabelecidas e mantidas as conex\u00f5es entre dispositivos de usu\u00e1rios e os dispositivos de rede. 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