SIP 302 Moved Temporarily vs 422 Session Interval Too Small
SIP 302 (Moved Temporarily) is a 3xx Redirection response, while 422 (Session Interval Too Small) is a 4xx Client Failure response. 302 indicates 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. In contrast, 422 means that the request's Session-Expires value is too small. The Min-SE header in the response indicates the minimum acceptable session interval.
Descrição
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.
Quando você o vê
When a user is temporarily reachable at a different location, such as when traveling or using a different device.
Como corrigir
Redirect the current call to the Contact URI provided, but keep the original URI for future requests.
Descrição
The request's Session-Expires value is too small. The Min-SE header in the response indicates the minimum acceptable session interval.
Quando você o vê
When using SIP session timers (RFC 4028) and the proposed session refresh interval is below the server's minimum.
Como corrigir
Increase the Session-Expires value to at least the value indicated in the Min-SE header of the 422 response.
Diferenças principais
302 is a 3xx Redirection response, while 422 is a 4xx Client Failure response.
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.
SIP 422: The request's Session-Expires value is too small. The Min-SE header in the response indicates the minimum acceptable session interval.
You encounter 302 when when a user is temporarily reachable at a different location, such as when traveling or using a different device.
You encounter 422 when when using SIP session timers (RFC 4028) and the proposed session refresh interval is below the server's minimum.
Quando usar qual
For 302 (Moved Temporarily): Redirect the current call to the Contact URI provided, but keep the original URI for future requests. For 422 (Session Interval Too Small): Increase the Session-Expires value to at least the value indicated in the Min-SE header of the 422 response.