Yealink SIP-T54S Administrator's Manual page 1085

2xx Responses—Successful
2xx Response
200 OK
202 Accepted
3xx Responses—Redirection
3xx Response
300 Multiple Choices
301 Moved Permanently
302 Moved Temporarily
305 Use Proxy
380 Alternative Service
4xx Responses—Request Failure
4xx Response
400 Bad Request
401 Unauthorized
402 Payment Required
403 Forbidden
404 Not Found
405 Method Not Allowed
406 Not Acceptable
407 Proxy Authentication
Required
408 Request Timeout
409 Conflict
410 Gone
411 Length Required
413 Request Entity Too Large
414 Request-URI Too Long
415 Unsupported Media Type
Supported
Yes
Yes In REFER transfer.
Supported
Yes
Yes
Yes
Yes
No
Supported
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
No
No
Yes
Yes
Appendix
Notes
Notes
Notes
1059