@nachfolger_ Hello and welcome to VAPI! It sounds like you've successfully linked your Vonage phone number, but there seems to be an issue with the audio connection during the call. The "Phone call provider closed websocket" message indicates that the connection between your phone call provider and VAPI was interrupted. Here are a few things you can check to troubleshoot the issue: 1. **Websocket Configuration**: Ensure that your websocket is correctly configured to handle the voice traffic. It should be able to maintain a stable connection during the call. 2. **Answer URL**: Verify that the answer URL in your VAPI application is correct and that it points to a server that can handle incoming webhook requests from VAPI. 3. **Firewall and Network Settings**: If you're hosting your own server, make sure that your firewall and network settings allow for incoming and outgoing traffic on the necessary ports for websockets. 4. **VAPI Application Logs**: Check the logs in your VAPI application for any errors or warnings that could provide more insight into why the websocket is being closed. 5. **SIP Configuration**: If you're using SIP, ensure that the

sipUri

attribute is correctly specified within the

forwardingPhoneNumbers

array to route the call to the appropriate SIP address. If you've checked all of these and the issue persists, it might be best to reach out to support with specific details about your setup so they can help you further. Would you like me to guide you on how to contact support or is there anything else I can assist you with right now?

(sometimes they provide only message/text numbers)