@andromate12357892 It sounds like you're encountering an issue where the system cannot find the phone number associated with the SIP calls. To resolve this, please ensure that the phone number you are trying to use is correctly configured in your VAPI settings and that it is properly linked to the webhook URL you've provided. If you've already done this and are still facing the issue, it could be a problem with the configuration on our end. In that case, I would recommend reaching out to our support team with the details of your configuration and the exact error message you're receiving. They will be able to assist you further in troubleshooting the problem. If you need any more assistance or have additional questions, feel free to ask!

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Got it. Tagging @User for additional help.