SIP 302 Moved Temporarily vs 501 Not Implemented
SIP 302 (Moved Temporarily) is a 3xx Redirection response, while 501 (Not Implemented) is a 5xx Server 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, 501 means that the server does not support the functionality required to fulfill the request. The method is recognized but not implemented.
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 server does not support the functionality required to fulfill the request. The method is recognized but not implemented.
Quando você o vê
When the SIP method is valid but the server has not implemented it (e.g., INFO, UPDATE, PRACK on a basic server).
Como corrigir
Use a different method that the server supports. Check the Allow header in responses to see supported methods.
Diferenças principais
302 is a 3xx Redirection response, while 501 is a 5xx Server 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 501: The server does not support the functionality required to fulfill the request. The method is recognized but not implemented.
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 501 when when the SIP method is valid but the server has not implemented it (e.g., INFO, UPDATE, PRACK on a basic server).
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 501 (Not Implemented): Use a different method that the server supports. Check the Allow header in responses to see supported methods.