Hi Matsuhito,
To set up your call center with Vapi, you have several options for guidance and support. Although Vapi doesn't natively support SIP registration via Asterisk, you can still leverage telephony integrations like Twilio, which can work in tandem with Vapi for comprehensive call management.
For hands-on support, you can explore the [Expert Directory](
https://docs.vapi.ai/community/expert-directory). This resource connects you with certified partners who can assist with planning, deployment, and troubleshooting, even if you have limited software experience. Engaging with an expert from this directory is often the quickest way to ensure your call center is effectively configured.
If you'd like to understand how Vapi can classify interactions during your call flows, consider using its API to integrate functionality that evaluates call outcomes and records them appropriately. This setup can help your system determine if interactions are positive or negative and handle contact details accordingly. For more structured outputs and AI capabilities, check out the [Lead Qualification Assistant](
https://docs.vapi.ai/assistants/examples/lead-qualification) documentation.
If you have further questions or need additional assistance, feel free to reach out.