User Manual

Appendix
393
4xx Response
Supported
Notes
421 Extension Required
No
423 Interval Too Brief
Yes
480 Temporarily Unavailable
Yes
481 Call/Transaction Does Not
Exist
Yes
482 Loop Detected
Yes
483 Too Many Hops
No
484 Address Incomplete
Yes
485 Ambiguous
No
486 Busy Here
Yes
487 Request Terminated
Yes
488 Not Acceptable Here
Yes
491 Request Pending
No
493 Undecipherable
No
5xx Response—Server Failure Responses
5xx Response
Supported
Notes
500 Internal Server Error
Yes
501 Not Implemented
Yes
502 Bad Gateway
No
503 Service Unavailable
No
504 Gateway Timeout
No
505 Version Not Supported
No
6xx Response—Global Responses
6xx Response
Supported
Notes
600 Busy Everywhere
Yes
603 Decline
Yes
604 Does Not Exist Anywhere
No
606 Not Acceptable
No