{"id":436,"date":"2024-03-11T16:34:09","date_gmt":"2024-03-11T13:34:09","guid":{"rendered":"https:\/\/sms-txt.net\/?p=436"},"modified":"2024-09-05T12:46:08","modified_gmt":"2024-09-05T09:46:08","slug":"une-breve-presentation-de-ss7","status":"publish","type":"post","link":"https:\/\/sms-txt.net\/fr\/ss7-sms\/une-breve-presentation-de-ss7\/","title":{"rendered":"Br\u00e8ve introduction au SS7"},"content":{"rendered":"<h1>Syst\u00e8me de signalisation n\u00b0 7 :<\/h1>\n<p><strong>SS7 - Signalling System # 7 - a \u00e9t\u00e9 anciennement. La signalisation et la plupart des op\u00e9rations qui peuvent \u00eatre utilis\u00e9es ont \u00e9t\u00e9 assembl\u00e9es avec une grande coop\u00e9ration des op\u00e9rateurs \/ \/ vendeurs \/ organismes de normalisation (CCITT, ETSI, itu t, etc.).<\/strong><\/p>\n<p><strong>Le SS7 est en fait un syst\u00e8me de signalisation d'arr\u00eat. Il est utilis\u00e9 par les n\u0153uds (par exemple, central de quartier, MSC\/VLR, GMSC, etc.) d'un r\u00e9seau de t\u00e9l\u00e9communication.<\/strong><br \/>\n<strong>Au Royaume-Uni, il est connu sous le nom de c 7 (CCITT # 7), num\u00e9ro 7 et Common Channel Interoffice Signaling 7 (CCIS7).<\/strong><\/p>\n<p>Le protocole SS7 est bien connu pour \u00eatre utilis\u00e9 dans le monde entier par les tuyaux de la s\u00e9rie Q.700 de 1988 de l'itu t.<\/p>\n<p>L'Internet Engineering Task Force (IETF) a d\u00e9fini le paquet de protocoles SIGTRAN qui met en \u0153uvre les niveaux 2, 3 et 4 des protocoles en utilisant harmonieusement le SS7. Parfois \u00e9galement appel\u00e9 Pseudo SS7, il s'articule autour du m\u00e9canisme de transport Stream Control Transmission Protocol (SCTP) \u00e0 utiliser sur les r\u00e9seaux de protocole Internet, comme l'Internet.<\/p>\n<h2>Une br\u00e8ve histoire du SS7<\/h2>\n<p>Depuis les ann\u00e9es 1960, les r\u00e9seaux t\u00e9l\u00e9phoniques publics commut\u00e9s (RTPC) sont constitu\u00e9s de technologies analogiques et de multiples m\u00e9thodes de signalisation \u00e0 l'int\u00e9rieur de la bande. L'augmentation du nombre d'utilisateurs finaux de la t\u00e9l\u00e9phonie fixe et la demande croissante de services \u00e9volutifs ont rapidement fait en sorte que d'anciens protocoles comme le R1 CAS sont devenus attrayants pour les fournisseurs de services. M\u00eame la r\u00e9volution du protocole RNIS s'est av\u00e9r\u00e9e \u00eatre un grand pas dans le secteur des t\u00e9l\u00e9communications, en passant d'un protocole de signalisation dans la bande (avec des tonalit\u00e9s, des bits vol\u00e9s \u00e0 la station vocale ou au canal cibl\u00e9) \u00e0 une signalisation hors bande (s\u00e9par\u00e9e des canaux vocaux) avec des primitives bas\u00e9es sur des messages adapt\u00e9es \u00e0 l'audio num\u00e9rique.<\/p>\n<p>M\u00eame si le RNIS corrigeait de nombreux probl\u00e8mes li\u00e9s aux protocoles plus anciens, son installation massive \u00e0 partir des syst\u00e8mes centraux n'a jamais vraiment eu lieu, laissant ainsi les fournisseurs avec une hi\u00e9rarchie \u00e9labor\u00e9e d'\u00e9quipements fonctionnant les uns avec les autres (ou essayant de le faire). M\u00eame si le RNIS offrait une solution plus facile pour fournir des solutions suppl\u00e9mentaires (c'est-\u00e0-dire la mise en attente, le transfert d'appel) aux utilisateurs finaux, le RNIS a progressivement migr\u00e9 vers la fronti\u00e8re de ce syst\u00e8me, plus proche de l'utilisateur final. En outre, aucun fournisseur d'outils n'a v\u00e9ritablement mis en \u0153uvre les sp\u00e9cifications de base du RNIS, ce qui a cr\u00e9\u00e9 de nombreuses variantes de voisinage et des inconv\u00e9nients pour les int\u00e9grateurs de syst\u00e8mes.<\/p>\n<p>\u00c0 l'\u00e9poque, des consortiums internationaux avaient commenc\u00e9 \u00e0 se concentrer sur l'utilisation d'une m\u00e9thode coordonn\u00e9e d'\u00e9tablissement des appels, afin de pr\u00e9senter de nombreux services (y compris ceux d\u00e9j\u00e0 pris en charge par le RNIS et les protocoles pour personnes \u00e2g\u00e9es) et de pouvoir cr\u00e9er de nouveaux logiciels (entreprises) sans avoir \u00e0 am\u00e9liorer la structure compl\u00e8te du r\u00e9seau. Le SS7 (ou Signaling System 7) a mis des ann\u00e9es \u00e0 se d\u00e9ployer sur l'ensemble de la plan\u00e8te, mais il est en train de r\u00e9aliser ce pour quoi il a \u00e9t\u00e9 con\u00e7u : fournir une norme de communication totale offrant de nombreuses solutions et capable de s'adapter aux exigences du public.<\/p>\n<p>M\u00eame si des versions locales ont \u00e9t\u00e9 mises en \u0153uvre et que de nombreuses modifications ont \u00e9t\u00e9 apport\u00e9es \u00e0 ce protocole, ce protocole de signalisation rejoint aujourd'hui la plupart des r\u00e9seaux t\u00e9l\u00e9phoniques importants dans le monde entier. Il pr\u00e9sente \u00e9galement une caract\u00e9ristique importante pour toutes les communaut\u00e9s du monde : la tol\u00e9rance aux pannes et la robustesse. Compos\u00e9 de plusieurs groupes fonctionnels, le SS7 a \u00e9t\u00e9 con\u00e7u pour que les n\u0153uds du r\u00e9seau n'aient pas besoin d'ex\u00e9cuter chaque partie de la pile de protocoles s'ils n'en ont pas besoin.<\/p>","protected":false},"excerpt":{"rendered":"<p>Syst\u00e8me de signalisation n\u00b0 7 : SS7 - Syst\u00e8me de signalisation # 7 - a \u00e9t\u00e9 anciennement. La signalisation et la plupart des op\u00e9rations qui peuvent \u00eatre utilis\u00e9es ont \u00e9t\u00e9 assembl\u00e9es avec une grande coop\u00e9ration des op\u00e9rateurs \/ \/ vendeurs \/ organismes de normalisation (CCITT, ETSI, itu t, etc.) . SS7 n'est en fait qu'une signalisation ferm\u00e9e...<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-436","post","type-post","status-publish","format-standard","hentry","category-ss7-sms"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v26.7) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A brief introduction of SS7<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sms-txt.net\/fr\/ss7-sms\/une-breve-presentation-de-ss7\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A brief introduction of SS7\" \/>\n<meta property=\"og:description\" content=\"Signaling System No. 7: SS7 &#8211; Signalling System # 7 &#8211; has been formerly. 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