SIP 199 Early Dialog Terminated vs 302 Moved Temporarily
SIP 199 (Early Dialog Terminated) is a 1xx Provisional response, while 302 (Moved Temporarily) 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, 302 means that the callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
설명
A UAS can send this to indicate that an early dialog has been terminated. Used when forking results in multiple early dialogs.
이 코드를 보게 되는 경우
In forked call scenarios when one of the forked branches is cancelled because another branch was answered.
해결 방법
No action needed. This is normal behavior in forked call setups. Ensure your UA handles early dialog termination gracefully.
설명
The callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
이 코드를 보게 되는 경우
When a user is temporarily reachable at a different location, such as when traveling or using a different device.
해결 방법
Redirect the current call to the Contact URI provided, but keep the original URI for future requests.
주요 차이점
199 is a 1xx Provisional response, while 302 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 302: The callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
You encounter 199 when in forked call scenarios when one of the forked branches is cancelled because another branch was answered.
You encounter 302 when when a user is temporarily reachable at a different location, such as when traveling or using a different device.
언제 어떤 것을 사용할지
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 302 (Moved Temporarily): Redirect the current call to the Contact URI provided, but keep the original URI for future requests.