Yealink SIP-T38G

Appendix
339
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
SDP Headers
Supported
v—Protocol version
Yes
o—Owner/creator and session
identifier
Yes
a—Media attribute
Yes
c—Connection information
Yes
m—Media name and transport
address
Yes
s—Session name
Yes
t—Active time
Yes