410 4xx Client error RFC 3261
SIP 410 Gone
The resource is permanently gone and no forwarding address is known.
Typical Q.850 / ISDN cause: 22 (Number changed)
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Common causes
- The number has been disconnected or ported away.
How to fix it
- Remove the number from contact lists and dialling campaigns.
Seeing 410 on calls through a router or firewall? Check that SIP ALG is disabled. It causes a surprising number of SIP errors. Read why.
About 4xx responses
The request has a problem or cannot be completed at this server, usually because of something on the requesting side or the target user.