{"id":33046,"date":"2020-12-28T15:21:05","date_gmt":"2020-12-28T15:21:05","guid":{"rendered":"https:\/\/voipstudio.com\/blog\/quanto-tempo-de-atraso-e-aceitavel-com-voip\/"},"modified":"2025-10-10T14:02:25","modified_gmt":"2025-10-10T13:02:25","slug":"quanto-tempo-de-atraso-e-aceitavel-com-voip","status":"publish","type":"post","link":"https:\/\/voipstudio.com\/pt\/blog\/quanto-tempo-de-atraso-e-aceitavel-com-voip\/","title":{"rendered":"Quanto tempo de atraso \u00e9 aceit\u00e1vel com VoIP?"},"content":{"rendered":"

Para que o sistema VoIP de uma empresa possa competir com o sistema telef\u00f4nico convencional, a qualidade da voz<\/a> deve ser pelo menos igual \u00e0 dos telefones anal\u00f3gicos<\/strong>. A qualidade do \u00e1udio tem sido uma grande preocupa\u00e7\u00e3o desde as primeiras implementa\u00e7\u00f5es da VoIP, quando a tecnologia era nova.<\/p>\n

Desde ent\u00e3o, a tecnologia tem melhorado com a adi\u00e7\u00e3o de novas caracter\u00edsticas<\/strong>. Al\u00e9m disso, os fornecedores tamb\u00e9m adquiriram conhecimento e experi\u00eancia, o que melhorou o servi\u00e7o.<\/p>\n

Entretanto, garantir uma boa qualidade de chamada<\/strong> pode ser dif\u00edcil para as empresas, pois a qualidade \u00e9 afetada por uma s\u00e9rie de fatores que s\u00e3o dif\u00edceis de abordar de uma s\u00f3 vez.<\/p>\n

Para alcan\u00e7ar a melhor experi\u00eancia, a otimiza\u00e7\u00e3o da rede \u00e9 essencial<\/strong>. Isso geralmente \u00e9 conseguido atrav\u00e9s do ajuste das configura\u00e7\u00f5es apropriadas de QoS. Isto diz ao equipamento de rede para dar prioridade \u00e0s chamadas VoIP em rela\u00e7\u00e3o a outros tipos de chamadas.<\/p>\n

Entretanto, o monitoramento<\/strong> regular das chamadas e da rede \u00e9 necess\u00e1rio para garantir que n\u00e3o haja muita diferen\u00e7a na qualidade esperada. As medidas mais comuns que s\u00e3o usadas para medir o desempenho da rede e a qualidade do \u00e1udio de extens\u00e3o incluem o estado dormente e jitter<\/em><\/strong>.<\/p>\n

Lat\u00eancia<\/h2>\n

Este \u00e9 o delay time<\/strong> para mover os pacotes de voz da fonte para o destino. Em geral, voc\u00ea n\u00e3o deve exceder 150 ms em uma dire\u00e7\u00e3o para evitar chamadas de m\u00e1 qualidade<\/strong>. Se uma parte da chamada viaja pela Internet p\u00fablica (que introduz sua pr\u00f3pria lat\u00eancia), a da rede interna da organiza\u00e7\u00e3o deve ser significativamente inferior a 150 ms.<\/p>\n

Delay (jitter)<\/h2>\n

Esta medida representa a variabilidade do atraso do pacote<\/strong>. No que diz respeito ao ponto de destino, os pacotes foram enviados em um fluxo cont\u00ednuo. Mas como cada pacote pode ter uma rota diferente, o congestionamento ou m\u00e1 configura\u00e7\u00e3o da rede pode resultar em varia\u00e7\u00f5es significativas no atraso do pacote de voz<\/strong>.<\/p>\n

Isto implica que os pacotes n\u00e3o ser\u00e3o recebidos na mesma ordem. Ou, talvez, se percam pelo caminho. A flutua\u00e7\u00e3o desta fase, que excede os 40 ms, pode causar uma perda de qualidade de chamada<\/strong>. Os altos n\u00edveis de atraso s\u00e3o freq\u00fcentemente o resultado de velocidades lentas ou redes congestionadas.<\/p>\n

Medi\u00e7\u00f5es das flutua\u00e7\u00f5es<\/h2>\n

O jitter de fase pode ser medido de v\u00e1rias maneiras diferentes, algumas das quais s\u00e3o detalhadas em v\u00e1rios padr\u00f5es da IETF para a RTP, tais como RFC 3550 e RFC 3611.<\/p>\n

Alguns desses m\u00e9todos s\u00e3o:<\/p>\n

    \n
  • varia\u00e7\u00e3o m\u00e9dia no atraso dos pacotes<\/li>\n
  • Absoluto varia\u00e7\u00e3o do atraso da embalagem<\/li>\n
  • Atraso do pacote em histogramas de varia\u00e7\u00e3o e par\u00e2metro Y.1541 IPDV.<\/li>\n<\/ul>\n

    A empresa precisa compreender cada m\u00e9todo e o valor que ele transmite a fim de utilizar par\u00e2metros ou suposi\u00e7\u00f5es diferentes. Infelizmente, muitos fabricantes de equipamentos ou prestadores de servi\u00e7os muitas vezes n\u00e3o publicam o m\u00e9todo que utilizam para ‘encadear’ os valores de mudan\u00e7a de fase<\/strong> em suas redes ou dispositivos.<\/p>\n

    No entanto, muitos fornecedores agora incluem em seus SLAs valores m\u00e9dios de jitter. Desta forma, os clientes podem ter certeza dos padr\u00f5es m\u00ednimos de qualidade que s\u00e3o aceit\u00e1veis.<\/p>\n

    Como compensar o atraso<\/h2>\n

    Com rela\u00e7\u00e3o ao atraso, uma das primeiras coisas que voc\u00ea deve verificar \u00e9 a rede da empresa QoS<\/strong> configura\u00e7\u00e3o. Se QoS n\u00e3o tiver sido configurado ou tiver sido configurado incorretamente, os pacotes de voz n\u00e3o receber\u00e3o a prioridade necess\u00e1ria, resultando em pacotes perdidos ou descartados<\/strong>.<\/p>\n

    As chamadas de \u00e1udio est\u00e3o provavelmente sujeitas a altos n\u00edveis de instabilidade, degradando a qualidade das conversas. Se a configura\u00e7\u00e3o de QoS estiver correta e o tr\u00e1fego da rede estiver em seus n\u00edveis habituais, n\u00e3o deve haver atraso<\/strong> significativo.<\/p>\n

    Pontos terminais VoIP, tais como telefones de mesa e ATAs, muitas vezes incluem um buffer jitter para compensar isso, garantindo que o dispositivo receptor possa armazenar um certo n\u00famero de pacotes e depois realinh\u00e1-los na ordem correta.<\/p>\n

    Dependendo do tamanho do buffer jitter, os pacotes fora de seq\u00fc\u00eancia podem ser reorganizados antes de serem entregues. No entanto, isto introduz algum atraso al\u00e9m da lat\u00eancia original da rede.<\/p>\n

    Os amortecedores de Jitter nem sempre funcionar\u00e3o, embora o tamanho possa ser aumentado at\u00e9 certo ponto. Em geral, eles s\u00f3 s\u00e3o eficazes para varia\u00e7\u00f5es de atraso inferiores a 100 ms e, mesmo assim, a perda de qualidade pode ser percept\u00edvel<\/strong> pelos usu\u00e1rios.<\/p>\n

    H\u00e1 v\u00e1rias ferramentas dispon\u00edveis que podem ser utilizadas por especialistas para isolar as fontes de atraso e elimin\u00e1-las. Portanto, as empresas devem tentar identificar as fontes de atraso em suas redes<\/strong>, em vez de depender de amortecedores de nervosismo.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Para que o sistema VoIP de uma empresa possa competir com o sistema telef\u00f4nico convencional, a qualidade da voz deve ser pelo […]<\/p>\n","protected":false},"author":8,"featured_media":37714,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-33046","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"yoast_head":"\nQuanto tempo de atraso \u00e9 aceit\u00e1vel com VoIP? · VoIPstudio<\/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:\/\/voipstudio.com\/pt\/blog\/quanto-tempo-de-atraso-e-aceitavel-com-voip\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quanto tempo de atraso \u00e9 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