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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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Comet Labs IPTEL-S Manual do Utilizador Página 27