Please assist. I have created a SIP trunk and linked the BYO phone number to my assistant however I am not receiving any inbound calls. When I call the number I receive a message “The person you are trying to reach is not available…”

Hi TrevorM, To resolve the issue with not receiving inbound calls on your SIP trunk, please check the following: 1. **Phone Number Registration**: Ensure that your phone number is correctly registered and associated with your SIP trunk. You can verify this by checking the registration status using the Vapi API.

bash
   curl -X POST https://api.vapi.ai/phone-number \
   -H "Content-Type: application/json" \
   -H "Authorization: Bearer YOUR_VAPI_PRIVATE_API_KEY" \
   -d '{
     "provider": "byo-phone-number",
     "name": "Your Phone Number",
     "number": "YOUR_PHONE_NUMBER",
     "numberE164CheckEnabled": false,
     "credentialId": "YOUR_CREDENTIAL_ID"
   }'

Refer to the [Create Phone Number Documentation](https://docs.vapi.ai/api-reference/phone-numbers/create) for further details. 2. **Network Configuration**: Ensure that the necessary IP addresses are allowlisted for SIP signaling and media. The IPs 44.229.228.186/32 and 44.238.177.138/32 should be allowed as part of your network configuration. Check the [SIP Trunking Guide](https://docs.vapi.ai/advanced/sip/sip-trunk) for specific network requirements. 3. **Assistant Configuration**: Confirm that your Vapi assistant configuration correctly links the phone number with the assistant's settings. The assistant must be active and correctly handle inbound call workflows. Please verify these points, and let me know if the issue persists.