SIP Responses
From Wikipedia, the free encyclopedia
SIP responses are the codes used by Session Initiation Protocol for communication. They complement the SIP Requests, which are used to initiate action such as a phone conversation.
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[edit] 1xx—Informational Responses
- 100 Trying
- 180 Ringing
- 181 Call Is Being Forwarded
- 182 Queued
- 183 Session Progress
[edit] 2xx—Successful Responses
- 200 OK
- 202 accepted: Used for referrals
[edit] 3xx—Redirection Responses
- 300 Multiple Choices
- 301 Moved Permanently
- 302 Moved Temporarily
- 305 Use Proxy
- 380 Alternative Service
[edit] 4xx—Client Failure Responses
- 400 Bad Request
- 401 Unauthorized: Used only by registrars. Proxys should use proxy authorization 407
- 402 Payment Required (Reserved for future use)
- 403 Forbidden
- 404 Not Found: User not found
- 405 Method Not Allowed
- 406 Not Acceptable
- 407 Proxy Authentication Required
- 408 Request Timeout: Couldn't find the user in time
- 410 Gone: The user existed once, but is not available here any more.
- 413 Request Entity Too Large
- 414 Request-URI Too Long
- 415 Unsupported Media Type
- 416 Unsupported URI Scheme
- 420 Bad Extension: Bad SIP Protocol Extension used, not understood by the server
- 421 Extension Required
- 423 Interval Too Brief
- 479 Regretfully, we were not able to process the URI (479/SL)
- 480 Temporarily Unavailable
- 481 Call/Transaction Does Not Exist
- 482 Loop Detected
- 483 Too Many Hops
- 484 Address Incomplete
- 485 Ambiguous
- 486 Busy Here
- 487 Request Terminated
- 488 Not Acceptable Here
- 489 Bad Event
- 491 Request Pending
- 493 Undecipherable: Could not decrypt S/MIME body part
- 494 Security Agreement Required
[edit] 5xx—Server Failure Responses
- 500 Server Internal Error
- 501 Not Implemented: The SIP request method is not implemented here
- 502 Bad Gateway
- 503 Service Unavailable
- 504 Server Time-out
- 505 Version Not Supported: The server does not support this version of the SIP protocol
- 513 Message Too Large
[edit] 6xx—Global Failure Responses
- 600 Busy Everywhere
- 603 Decline
- 604 Does Not Exist Anywhere
- 606 Not Acceptable
