Issue

Inability to establish outgoing or incoming calls.

Possible Causes and Solutions

Users can experience issues connecting their calls, and there are several ways to troubleshoot them.

Reason 1. SIP Trunk Issues

Verify that your SIP trunk credentials are correct and that the trunk is registered.

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NOTE

Please check the Trunks and SIP Trunking (Termination & Origination) articles for more details.

Reason 2. DNS Resolution Problems

Ensure that your PBX can resolve the domain names of VoIP providers. Configure appropriate DNS servers.

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NOTE

For more details, please check the Access Control Lists section.