To resolve the
403 error when making outbound calls with Telnyx, make sure you have added Vapi as a connection in your Telnyx portal:
1. Log in to the [Telnyx Portal](
https://portal.telnyx.com/#/outbound-profiles).
2. Go to your
Outbound Voice Profile.
3. Under
Connections and Applications, add
Vapi as a connection and save.
Without this step, outbound calling will not work properly with your Telnyx numbers on Vapi.
Source:
- [Telnyx Integration Guide](
https://docs.vapi.ai/telnyx)