I have connected Telnxy but its not working because the audio quality is so bad, that the AI Agent doesn´t understand anything.

Thanks for sharing the issue. To help diagnose the poor audio quality with Telnyx direct connect, could you let me know if you are using any noise reduction or denoising features (like "Smart Denoising" or "Fourier Denoising") in your current setup? Source: - [Smart Denoising configuration](https://docs.vapi.ai/documentation/assistants/conversation-behavior/background-speech-denoising)

@fabi Where are you performing your services exactly? you connected a phone number from what country ?

German personal phone number on telync

Hi fabi, If you need help integrating Telnyx SIP with Vapi, follow these streamlined steps: 1. **Retrieve Vapi Private Key**: Log in to Vapi, navigate to Organization Settings, and copy your Private Key. 2. **Configure Telnyx for Inbound Calls**: - Create a SIP trunk with FQDN:

sip.vapi.ai

, port 5060. - Assign a phone number to the SIP trunk. - Set the "Translated Number" to your Vapi SIP URI (e.g.,

sip:<your-unique-id>@sip.vapi.ai

). 3. **Configure Telnyx for Outbound Calls**: - Create an outbound voice profile and assign it to your SIP trunk. - Add your Telnyx SIP credentials to Vapi using the Vapi API. 4. **Add Phone Number to Vapi**: - Use the Vapi API to associate your phone number with the SIP trunk. 5. **Assign Voice Assistant**: Go to the Vapi dashboard > Build section, click on your Telnyx Number, and assign your voice assistant to handle calls. 6. **Make Outbound Calls**: Use the Vapi API to initiate calls through your Telnyx SIP trunk. Ensure all placeholder values (such as your Vapi private key and phone numbers) are replaced with your actual info. For more details, check out the [Telnyx SIP Integration Guide](https://docs.vapi.ai/advanced/sip/telnyx). If you encounter call forwarding issues, the [Debug Call Forwarding Drops](https://docs.vapi.ai/phone-calling/transfer-calls/debug-forwarding-drops) guide provides helpful troubleshooting steps such as verifying SIP configuration, analyzing telephony provider logs, and ensuring compatibility in transfer scenarios. If this doesn’t resolve the issue, please let us know and we’ll be happy to step in and assist further.