380 3xx Redirection RFC 3261
SIP 380 Alternative Service
The call failed, but alternative services are possible. Also used in emergency calling (RFC 5031) to redirect callers.
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Common causes
- Service redirection, emergency call handling.
How to fix it
- Check the response body for details of the alternative service.
Seeing 380 on calls through a router or firewall? Check that SIP ALG is disabled. It causes a surprising number of SIP errors. Read why.
About 3xx responses
The caller should try a different location to complete the request.