Le téléphone IP industriel ne peut pas mettre fin correctement à l'appel (une fois que l'appelé raccroche, l'appelant reste dans l'état d'appel)

Introduction

Présentation générale

Après que le téléphone a sonné et que la personne appelée a répondu à l’appel, la communication est établie avec un son normal. Lorsque la personne appelée raccroche, le téléphone revient à l’état inactif. Cependant, l’appelant reste en état d’appel et ne peut pas mettre fin automatiquement à l’appel.

Modèles applicables

Tous les modèles de téléphones IP de notre entreprise.

Public cible

Ce document est destiné à tous les utilisateurs rencontrant ce problème.

 Cause principale

 Lorsque la personne appelée raccroche, le téléphone envoie activement un message BYE à l’appelant afin de demander la fin de l’appel. Le téléphone envoie les messages de requête à l’adresse contenue dans l’en-tête VIA du message précédemment reçu. Dans certains déploiements réseau, le PBX se trouve sur un réseau interne, mais il est mappé vers un réseau public via NAT. Les messages SIP envoyés par ce type de PBX contiennent une adresse IP privée dans l’en-tête VIA. Par conséquent, le téléphone ne peut pas transmettre correctement les messages de requête suivants à l’extrémité distante, ce qui entraîne l’échec du raccrochage de l’appel.

 Solution

 Activez la fonction "Contact direct" dans la configuration du téléphone afin de permettre au téléphone d’envoyer les messages de requête directement à l’adresse indiquée dans l’en-tête Contact de l’extrémité distante. Suivez les étapes ci-dessous :

Étape 1

Connectez-vous à l’interface Web du téléphone, accédez à Système > Configuration du système, faites un clic droit et sélectionnez Enregistrer le lien sous... pour enregistrer le fichier de configuration sous le nom config.txt.

Configuration du système

 Étape 2

 Ouvrez le fichier config.txt, utilisez Ctrl+F pour rechercher le mot-clé Direct Contact. Remplacez les valeurs de SIP1 Direct Contact :0 et SIP2 Direct Contact :0 par SIP1 Direct Contact :1 et SIP2 Direct Contact :1 respectivement, puis enregistrez le fichier.
  config

 Étape 3

 Connectez-vous à nouveau à l’interface Web du téléphone, accédez à Système > Configuration du système > Importer la configuration. Cliquez sur Choisir un fichier, sélectionnez le fichier config.txt modifié, puis cliquez sur Importer. Le téléphone redémarrera automatiquement pour terminer la mise à jour de la configuration.

Configuration du système


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