Hello Vapi-Team, I created the warm call forwarding tool for my Plenty AI Assistant (ID 27680bab-7dbb-40c7-a4e6-21b66501bad9), but its not working. The call IDs are eb0d86d9-d9fd-46c2-a46c-5975c483d8f8 and f789a809-0f5a-4f69-a407-c1ef984ea1de. I tried several times... Is there an issue at Twilio? I tried different call and forwarding numbers, but the call ends without ringing. Please check that. What can I do? Is the configuration right? Looking forward to hearing from you.

Hi there! I'd be happy to help troubleshoot your warm call forwarding tool issue. To better diagnose the problem, could you please share: 1. Which transfer mode are you using for your warm call forwarding (e.g.,

warm-transfer-with-message

,

warm-transfer-with-summary

,

warm-transfer-twiml

)? 2. Could you share the exact configuration of your

transferCall

tool (with sensitive information redacted)? This would help me check if there are any formatting issues. 3. Are you seeing any specific error messages in your logs when the call attempts to forward? 4. Have you recently made any changes to your Twilio configuration or migrated your Twilio numbers to a different region? 5. Are the forwarding phone numbers in E.164 format (e.g., +15558675309)? This information will help me provide more targeted troubleshooting steps for your specific situation. Sources: - [Call Forwarding Documentation](https://docs.vapi.ai/call-forwarding) - [Warm Transfer Configuration](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1305244632124227654) - [Twilio Configuration Troubleshooting](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336432457943351358) - [SIP Configuration Issues](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336713212233515089)

Which transfer mode are you using for your warm call forwarding (e.g., warm-transfer-with-message, warm-transfer-with-summary, warm-transfer-twiml)? warm with summary Could you share the exact configuration of your transferCall tool (with sensitive information redacted)? This would help me check if there are any formatting issues. see screenshot please Are you seeing any specific error messages in your logs when the call attempts to forward? no, the log says success Have you recently made any changes to your Twilio configuration or migrated your Twilio numbers to a different region? Are the forwarding phone numbers in E.164 format (e.g., +15558675309)? https://cdn.discordapp.com/attachments/1354363026416992337/1354368629394772029/image.png?ex=67e50994&is=67e3b814&hm=9264baa0d89af80585a44bd5e5da3ca1c74d8a59db9ff37de2e9cc056ae57683&

Hey Volker, You need to remove the server-assistant server event phone call control when you use this event. You're telling VAPI, "Hey, I want to control how the transfer should work instead of VAPI." So, before a request to your server URL and wait for you to do the forwarding. Actually, we don't wait; we just delegate this to your server. Remove this from your system, and then your call forwarding will work as expected. 🔵 09:34:05:597 Server Message Requested...(phone-call-control , [https://hook.eu2.makeh6c](https://hook.eu2.make.com/jdv7vqqfdpwc3v1qm55me4rwjpri1h6c)): { "type": "phone-call-control", "request": "forward", "forwardingPhoneNumber": "+", "destination": { "type": "number", "number": "+", "message": "Ich möchte Sie mit jemandem in Verbindung bringen, der Ihnen dabei besser helfen kann.", "description": "Nutzen Sie diese Funktion, um auf Wunsch des Benutzers oder bei Fragen, die Sie nicht beantworten können, den Anruf an den Kundensupport weiterzuleiten.", "numberE164CheckEnabled": true, "transferPlan": { "mode": "blind-transfer", "message": "Warten Sie eine Sekunde!", "summaryPlan": { "enabled": true, "timeoutSeconds": 15, "useAssistantLlm": false }, "sipVerb": "refer" } } }