No Audio on Calls and Calls Not Ending Properly

[roadsmuza]

Description:

We are experiencing two main issues with our 3CX system:

1. No Audio During Calls: When making calls, there is no audio transmitted at all. We have disabled SIP ALG and ensured proper port forwarding (ports 5060, 5090, and 9000-10998) on our firewall. The 3CX Firewall Checker still fails, indicating a potential network issue.

2. Calls Not Ending Properly: When a call is declined by the receiver, the 3CX UI continues to show the call as active, causing delays and confusion.

Our setup is as follows:
- 3CX Version: 20.0.995 SP9
- Deployment: On-premise (self-managed)
- License: PRO Edition, 8 simultaneous calls

We have confirmed with our SIP provider, Telnyx, that no IP whitelisting is required as they use username and password authentication. However, the audio issue persists.

Any guidance on resolving these issues would be greatly appreciated

 

[bitn2]

If the firewalchecker fails, than there is still a problem. You need to check this first.

 

[Charles_3CX]

The 3CX Firewall Checker is failing, which indicates that the firewall/network configuration needs to be checked.

Please verify the required port forwarding, NAT configuration, SIP ALG, and any firewall or security rules that may be blocking the required traffic. Once the Firewall Checker passes, the issues can be retested.