Change in MS Teams VoIP after upgrade from 7.2.10 to 7.4.5 with one way voice

Hello Pedro,

Thank you for using the Community Forum. I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.

Thanks,

Hello Pedro,

I may found an answer to your question: how to troubleshoot the one-way voice issue in MS Teams VoIP after upgrading from FortiOS 7.2.10 to 7.4.5,

1. Check SIP ALG Configuration:  Verify that the SIP ALG settings are correctly configured on the FortiGate device. Ensure that SIP ALG is enabled and properly configured for MS Teams VoIP traffic.
2. Clear Sessions: Clear all sessions related to the VoIP traffic passing through the FortiGate device. This can help in resetting any existing connections that might be causing the one-way voice issue.

diag sys session filter clear

diag sys session filter dport <VoIP port>

diag sys session clear

3. Restart Phone System: It is recommended to restart the phone system after making any changes to the FortiGate configuration to ensure that all devices establish new connections properly.
4. Verify Network Configuration:  Check the network configuration to ensure that there are no routing or firewall issues causing the one-way voice problem. Verify that the necessary ports for MS Teams VoIP are open and correctly configured.
5. Monitor Traffic: Use tools like packet capture or traffic logs on the FortiGate to monitor the VoIP traffic flow and identify any anomalies or issues that might be causing the one-way voice problem.