SIP 181 Call Is Being Forwarded vs 302 Moved Temporarily
SIP 181 (Call Is Being Forwarded) is a 1xx Provisional response, while 302 (Moved Temporarily) is a 3xx Redirection response. 181 indicates that a proxy server may send this to indicate that the call is being forwarded to a different set of destinations. 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 proxy server may send this to indicate that the call is being forwarded to a different set of destinations.
이 코드를 보게 되는 경우
When the callee has call forwarding enabled and the request is being redirected to another number or device.
해결 방법
No action needed. The call is being redirected. If forwarding is unintended, the callee should update their forwarding settings.
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
181 is a 1xx Provisional response, while 302 is a 3xx Redirection response.
SIP 181: A proxy server may send this to indicate that the call is being forwarded to a different set of destinations.
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 181 when when the callee has call forwarding enabled and the request is being redirected to another number or device.
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 181 (Call Is Being Forwarded): No action needed. The call is being redirected. If forwarding is unintended, the callee should update their forwarding settings. For 302 (Moved Temporarily): Redirect the current call to the Contact URI provided, but keep the original URI for future requests.