Appendix
439
Method
Supported
Notes
Subscription-State
Yes
Supported
Yes
To
Yes
User-Agent
Yes
Via
Yes
The following SIP responses are supported:
Note
1xx Response—Information Responses
1xx Response
Supported
Notes
100 Trying
Yes
180 Ringing
Yes
181 Call Is Being Forwarded
Yes
183 Session Progress
Yes
2xx Response—Successful Responses
2xx Response
Supported
Notes
200 OK
Yes
202 Accepted
Yes
In REFER transfer.
3xx Response—Redirection Responses
3xx Response
Supported
Notes
300 Multiple Choices
Yes
301 Moved Permanently
Yes
302 Moved Temporarily
Yes
In the following table, a “Yes” in the Supported column means the header is sent and
properly parsed. The phone may not actually generate the response.
Summary of Contents for Yealink SIP-T28P
Page 1: ......
Page 28: ...Administrator s Guide for SIP T2xP and SIP T19P IP Phones 12 ...
Page 76: ...Administrator s Guide for SIP T2xP and SIP T19P IP Phones 60 ...
Page 226: ...Administrator s Guide for SIP T2xP and SIP T19P IP Phones 210 ...
Page 238: ...Administrator s Guide for SIP T2xP and SIP T19P IP Phones 222 ...
Page 253: ...Configuring Security Features 237 ...
Page 265: ...Resource Files 249 ...
Page 279: ...Troubleshooting 263 ...