----------------------------- **While I generate an answer, here are some sources that might be helpful**: * [Phone Calling]() * [List Calls]() * [Call Ended Reason]() * [Import Twilio Number]() -----------------------------

### Answer The "twilio-failed-to-connect-call" ended reason suggests there was an issue establishing a connection through Twilio for your call. While the specific reason for this Twilio connection failure isn't detailed within the Vapi documentation, there are general steps you can take to troubleshoot this issue: 1. **Check Twilio Configuration**: Ensure that your Twilio account SID and Auth Token are correctly configured if you're using a Twilio number with Vapi. This is crucial for enabling Vapi to manage calls through Twilio effectively [(1)]() . 2. **Review Vapi Integration**: Confirm that the phone number is correctly imported and configured within Vapi. This includes checking if the phone number is set up to handle inbound and outbound calls as necessary [(1)]() [(2)]() . 3. **Examine Assistant Assignment**: Verify that an assistant is correctly assigned to the phone number for handling calls. If a phone number does not have an assistant assigned or the assistantId provided is not recognized, Vapi might not handle the calls as intended [(3)]() . 4. **Investigate Network and API Errors**: Sometimes, issues might arise from network problems or temporary API disruptions. Reviewing Vapi's status page or checking for any alerts regarding Twilio's service status might provide insights. 5. **Call Logs and Error Messages**: Vapi provides call logs that include detailed information about each call's status and any errors encountered. Checking the specific call log for the call ID provided might offer clues on what went wrong during the call setup [(4)]() . 6. **Consult Do

cumentation**: Vapi's documentation and FAQ sections might have relevant information regarding common issues and troubleshooting tips for Twilio integration [(3)]() [(1)]() . 7. **Community Insights**: Sometimes, similar issues have been encountered and discussed by other Vapi users. Checking community forums or discussions, like Discord, might provide solutions or workarounds [(5)]() [(6)]() [(7)]() . If these steps do not resolve the issue, it might be necessary to directly consult Twilio's documentation or support for more Twilio-specific troubleshooting or consider reaching out to Vapi support for further assistance with the Vapi integration aspect.

Got it. Tagging @User for additional help.

still getting this error

@User just bumping this - still unsolved