Yealink SIP-T19 E2 [799/841] Xx response server failure responses

Yealink SIP-T21 E2 [799/841] Xx response server failure responses
Appendix
783
4xx Response
Supported
Notes
493 Undecipherable
No
5xx ResponseServer 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 ResponseGlobal 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
vProtocol version
Yes
oOwner/creator and session
identifier
Yes
aMedia attribute
Yes
cConnection information
Yes
mMedia name and transport
address
Yes
sSession name
Yes
tActive time
Yes

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