SIP Error Codes

• 401 Unauthorized
• 403 Forbidden
• 404 Not Found
• 407 Proxy Authentication Required
• 409 Got SIP response 409 "Conflict" back from
• 415 Unsupported Media Type
• 416 Unsupported URI Scheme
• 476 Unresolvable destination
• 480 Temporarily Unavailable
• 483 Interval Too Brief
• 484 Address Incomplete
• 486 Busy Here
• 487 Request Terminated
• 488 Not acceptable here
• 489 Bad event
• 500 Internal server error
• 503 Service Unavailable
• 603 Declined

See also

• http://en.wikipedia.org/wiki/List_of_SIP_response_codes
• http://www.voip-info.org/wiki/index.php?page=Asterisk+variable+hangupcause