
Status Codes
8/31/2005 Copyright - Ahlgren 2005 27
AhlTek
Borrowed from HTTP.
x80 and higher codes avoid conflicts with future HTTP response codes
Message from server to the client
Provisional Codes - (1xx class)
indicate progress, Do not terminate SIP transactions
Final Codes - (2xx, 3xx, 4xx, 5xx, 6xx classes)
Terminate SIP transactions.
Status Codes
1XX – information messages (100 – trying, 180 – ringing, 183 – progress)
2XX – successful request completion (200 – OK)
3XX – call forwarding, redirection (302 – temporarily moved, 305 – use proxy)
4XX – client error, request failure (403 – forbidden)
5XX – server error (500 – Server Internal Error, 501 – not implemented)
6XX – global failure, busy, refused, not available (606 – Not Acceptable)
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