Fixed all as per your suggestions. https://discord.com/channels/1211482211119796234/1349760652797022308 https://discord.com/channels/1211482211119796234/1349457002417487932 getting SIP 480

Hi there! I see you're still experiencing a SIP 480 error despite implementing some fixes. Let me help you troubleshoot this further! 🔍 A SIP 480 error typically indicates that the requested service is "Temporarily Unavailable" - meaning the user or service your SIP requests are trying to reach isn't currently available or can't accept the call at that moment. Here are some common causes and troubleshooting steps you can try: 1. **Check your firewall and network configuration**: - Ensure your firewall allows SIP traffic and the correct ports (commonly 5060 for SIP) are open - Check for issues with SIP ALG (Application Layer Gateway) settings that might interfere with SIP messaging 2. **Verify your SIP URI configuration**: - Make sure the SIP URI in the

sipUri

attribute is formatted correctly and points to a valid SIP address 3. **Examine your SIP server settings**: - Confirm your SIP server is configured to accept calls from Vapi's servers - Check that expected headers and authentication methods align with the requests being sent 4. **Ensure proper handling of SIP REFER messages**: - Vapi uses SIP REFER for call transfers - make sure your system is correctly configured to handle these 5. **Review logs for clues**: - Check both Vapi and SIP server logs for specific error messages that might indicate where the connection is failing 6. **Test your setup**: - Try using tools like

curl

or another SIP testing tool to manually send an INVITE request to validate server response Since you've already tried some fixes, could you share which specific steps you've already taken? This would help me provide more targeted assistance for your situation. Let me know if you need more detailed guidance on any of these steps! 👍 Sources: - [What does the SIP 480 error indicate in the Vapi platform?](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334919245468799007)

Message marked as helpful by @Vladimir! 🎉

Hello Vladimir, is this issue resolved or do you still need support?