Administrator Guides EN Owner's manual

Abstract (from RFC3261):
13-5 41-001391-00 Rev 03 – 04.2012
No CR or LF is allowed except in the final CRLF sequence.
Status-Line = SIP-Version SP Status-Code SP Reason-Phrase CRLF
The Status-Code is a 3-digit integer result code that indicates the outcome of an attempt to understand and satisfy a
request. The Reason-Phrase is intended to give a short textual description of the Status-Code. The Status-Code is
intended for use by automata, whereas the Reason-Phrase is intended for the human user. A client is not required to
examine or display the Reason-Phrase.
While this specification suggests specific wording for the reason phrase, implementations MAY choose other text, for
example, in the language indicated in the Accept-Language header field of the request.
The first digit of the Status-Code defines the class of response. The last two digits do not have any categorization role. For
this reason, any response with a status code between 100 and 199 is referred to as a "1xx response", any response with a
status code between 200 and 299 as a "2xx response", and so on. SIP/2.0 allows six values for the first digit:
1xx: Provisional - request received, continuing to process the request;
2xx: Success - the action was successfully received, understood, and accepted;
3xx: Redirection - further action needs to be taken in order to complete the request;
4xx: Client Error - the request contains bad syntax or cannot be fulfilled at this server;
5xx: Server Error - the server failed to fulfil an apparently valid request;
6xx: Global Failure - the request cannot be fulfilled at any server.
Commonly used response codes and their meanings include:
100 Trying
Sent by SIP entities to denote that the request has been successfully received, and is being processed.
180 Ringing
Sent by a user agent after an INVITE has been received if the user agent is willing to accept calls.
200 OK
Sent by a SIP entity to denote that the request has succeeded (e.g. The user has answered the phone after an INVITE
request)
301 Moved Permanently
Indicates that the requested user's address has changed, and the user agent should update the local address book.
302 Moved Temporarily
Indicates that the requested user should temporarily be contacted at the specified new address. This is used by the
Redirects Service in the BluStar system.
401 Unauthorized
The request is not authorized. This can be due to a number of reasons, e.g. the callee is not logged in.
403 Forbidden
The server understood the request, but is refusing to fulfil it. Authorization will not help, and the request SHOULD
NOT be repeated.
404 Not Found
The server has definitive information that the user does not exist at the domain specified in the Request-URI. This
status is also returned if the domain in the Request-URI does not match any of the domains handled by the recipi-
ent of the request.