{"id":433,"date":"2022-03-15T14:24:32","date_gmt":"2022-03-15T13:24:32","guid":{"rendered":"https:\/\/blog.beevoip.it\/?p=433"},"modified":"2022-03-15T14:24:33","modified_gmt":"2022-03-15T13:24:33","slug":"protocollo-sip-perche-cade-la-chiamata","status":"publish","type":"post","link":"https:\/\/www.beevoip.it\/blog\/protocollo-sip-perche-cade-la-chiamata\/","title":{"rendered":"SIP: perch\u00e9 cade la chiamata"},"content":{"rendered":"\n

A volte, quando si fa o si riceve una chiamata, questa viene stabilita correttamente e mentre stiamo parlando con l’interlocutore, dopo un po\u2019, la chiamata cade. Perch\u00e9 cade la chiamata?<\/p>\n\n\n\n

Diverse possono essere le cause:<\/p>\n\n\n\n

– problema di NAT:<\/p>\n\n\n\n

quando il messaggio ACK (conferma dell\u2019INVITE) non viene consegnato entro il timeout previsto la chiamata cade (le chiamate cadranno sempre con la stessa durata). In questo caso bisogner\u00e0 controllare le configurazioni delle regole del proprio fiewall\/router compresa l\u2019eventuale presenza del \u201cSIP ALG\u201d che andr\u00e0 disabilitato.<\/p>\n\n\n\n

– assenza di trasmissione di pacchetti audio RTP:<\/p>\n\n\n\n

sicuramente i centralini \u201cAsterisk based\u201d, ma anche altri centralini, verificano la presenza di pacchetti RTP per mantenere la sessione audio attiva e nel caso di silenzio prolungato (assenza di traffico RTP) considerare conclusa la chiamata con l\u2019invio del messaggio BYE. In questo caso, per i centralini \u201cAsterisk based\u201d, verificare che le localnet dichiarate siano corrette.<\/p>\n","protected":false},"excerpt":{"rendered":"

A volte, quando si fa o si riceve una chiamata, questa viene stabilita correttamente e mentre stiamo parlando con l’interlocutore, dopo un po\u2019, la chiamata cade. Perch\u00e9 cade la chiamata? Diverse possono essere le cause: – problema di NAT: quando il messaggio ACK (conferma dell\u2019INVITE) non viene consegnato entro il timeout previsto la chiamata cade […]<\/p>\n","protected":false},"author":7,"featured_media":530,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[7],"tags":[],"class_list":{"0":"post-433","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-voip"},"yoast_head":"\nSIP: perch\u00e9 cade la chiamata - Blog Beevoip<\/title>\n<meta name=\"description\" content=\"Diverse possono essere le cause. 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