SIP 480 Temporarily Unavailable
FreeSWITCHRFC 3261 §21.4.18Callee is registered but not in a state to accept the call (DND, forwarded, no endpoint listening, etc.).
Common causes on FreeSWITCH
- User is on Do-Not-Disturb
- No SIP endpoint registered for the AOR
- Forwarded to voicemail and voicemail is offline
- Endpoint has stale registration (NAT keepalive failed)
Stop guessing — paste your trace
Drop your PCAP or sngrep log and SIP Flow will render the ladder, surface the failing transaction, and (optionally) ask Gemini to suggest the fix grounded in FreeSWITCH docs.
Open analyzerDon't have a trace yet? See how to capture one in Wireshark, sngrep, or your PBX