SIP 199 Early Dialog Terminated vs 305 Use Proxy
SIP 199 (Early Dialog Terminated) is a 1xx Provisional response, while 305 (Use Proxy) is a 3xx Redirection response. 199 indicates that a UAS can send this to indicate that an early dialog has been terminated. Used when forking results in multiple early dialogs. In contrast, 305 means that the requested resource must be accessed through the proxy given by the Contact header field.
描述
A UAS can send this to indicate that an early dialog has been terminated. Used when forking results in multiple early dialogs.
何时出现
In forked call scenarios when one of the forked branches is cancelled because another branch was answered.
如何修复
No action needed. This is normal behavior in forked call setups. Ensure your UA handles early dialog termination gracefully.
描述
The requested resource must be accessed through the proxy given by the Contact header field.
何时出现
When the request must be routed through a specific outbound proxy server.
如何修复
Resend the request through the proxy specified in the Contact header of this response.
主要区别
199 is a 1xx Provisional response, while 305 is a 3xx Redirection response.
SIP 199: A UAS can send this to indicate that an early dialog has been terminated. Used when forking results in multiple early dialogs.
SIP 305: The requested resource must be accessed through the proxy given by the Contact header field.
You encounter 199 when in forked call scenarios when one of the forked branches is cancelled because another branch was answered.
You encounter 305 when when the request must be routed through a specific outbound proxy server.
何时使用哪个
For 199 (Early Dialog Terminated): No action needed. This is normal behavior in forked call setups. Ensure your UA handles early dialog termination gracefully. For 305 (Use Proxy): Resend the request through the proxy specified in the Contact header of this response.