Hi, Just created an assistant for inbound calls. These calls are sended from 3CX to xxx@sip.vapi.ai Some calls works and some others without any reason doesn't work at all and continue to ring. 3CX says sip.vapi.ai doesn't respond. These calls are not in the Call logs. One the ones who works like this one : 019b59b6-25a7-722a-adfb-23b82b8b173e thanks in advance,

Thank you for the details. To help diagnose why some inbound calls from 3CX to Vapi are not reaching your assistant or appearing in the call logs, could you confirm if you have allowlisted the Vapi SIP signaling IPs (44.229.228.186/32 and 44.238.177.138/32) on your 3CX system? This is a common requirement for proper SIP trunk operation and missing this step can cause calls to not be delivered to Vapi. If you have already done this, please let me know so I can suggest the next troubleshooting step. Source: - [Vapi SIP Trunk Documentation](https://docs.vapi.ai/advanced/sip/sip-trunk)

Message marked as helpful by @Nikolas! 🎉

nice job the bot ! looks good. 🙂