SIP 302 Moved Temporarily vs 604 Does Not Exist Anywhere
SIP 302 (Moved Temporarily) is a 3xx Redirection response, while 604 (Does Not Exist Anywhere) is a 6xx Global 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, 604 means that the server has authoritative information that the user indicated in the Request-URI does not exist anywhere. Unlike 404, this is a definitive, global statement.
Descripción
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.
Cuándo lo verás
When a user is temporarily reachable at a different location, such as when traveling or using a different device.
Cómo solucionarlo
Redirect the current call to the Contact URI provided, but keep the original URI for future requests.
Descripción
The server has authoritative information that the user indicated in the Request-URI does not exist anywhere. Unlike 404, this is a definitive, global statement.
Cuándo lo verás
When the user definitively does not exist on any server in the network. The server has authoritative knowledge, not just local.
Cómo solucionarlo
The user does not exist. Verify the SIP URI or phone number. Unlike 404, retrying on other servers will not help.
Diferencias clave
302 is a 3xx Redirection response, while 604 is a 6xx Global 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 604: The server has authoritative information that the user indicated in the Request-URI does not exist anywhere. Unlike 404, this is a definitive, global statement.
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 604 when when the user definitively does not exist on any server in the network. The server has authoritative knowledge, not just local.
Cuándo usar cada uno
For 302 (Moved Temporarily): Redirect the current call to the Contact URI provided, but keep the original URI for future requests. For 604 (Does Not Exist Anywhere): The user does not exist. Verify the SIP URI or phone number. Unlike 404, retrying on other servers will not help.