How to Troubleshoot VoIP Calls With One-Way Audio on a VPN

VPN routing or NAT can allow call setup while preventing media streams from returning through the expected path.

Checks to make

Compare calls with and without the VPN where policy allows, inspect media route and firewall state, and check split-tunnel and provider requirements. Capture a provider call reference and avoid weakening VPN protections without authorization.

When to get help

Voice support can analyze media routing with network and VPN owners. Informatix Systems can assess the symptoms, evidence, and next steps. Contact Informatix Systems to discuss this issue.