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Action Step: Go to your Vapi dashboard and navigate to

Observe > API Logs

. Look for the 400 Bad Request entry related to

/telnyx/inbound_call

and review the request payload and error details—this will help you pinpoint if there's a misconfiguration or missing field causing the audio issue. Tip: Testing your assistant directly in the dashboard can also help isolate whether the problem is with Telnyx or your Vapi setup. For reference, see the [Debugging Guide](https://docs.vapi.ai/debugging). Source: - [Debugging Guide](https://docs.vapi.ai/debugging)

HI can you please confirm if you are still facing the issue?