B-4
SIP Response Messages
• 409 Conflict
• 410 Gone
• 411 Length Required
• 413 Request Entity Too Large
• 414 Request-URI Too Large
• 415 Unsupported Media Type
• 420 Bad Extension
• 480 Temporarily not available
• 481 Call Leg/Transaction Does Not Exist
• 482 Loop Detected
• 483 Too Many Hops
• 484 Address Incomplete
• 485 Ambiguous
• 486 Busy Here
5xx Responses 5xx SIP response message are server error responses:
• 500 Internal Server Error
• 501 Not Implemented
• 502 Bad Gateway
• 503 Service Unavailable
• 504 Gateway Time-out
• 505 SIP Version not supported
6xx Responses 6xx SIP response message are global failure responses:
• 600 Busy Everywhere
• 603 Decline
• 604 Does not exist anywhere
• 606 Not Acceptable