SIP 301 Moved Permanently vs 380 Alternative Service
Both SIP 301 (Moved Permanently) and 380 (Alternative Service) belong to the 3xx Redirection category. 301 indicates that the user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header. Meanwhile, 380 means that the call was not successful but alternative services are possible. The response body contains a description of alternative services.
Descrição
The user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header.
Quando você o vê
When a user has permanently changed their SIP address. All future calls should be directed to the new URI.
Como corrigir
Update your address book or routing tables to use the new Contact URI provided in the response.
Descrição
The call was not successful but alternative services are possible. The response body contains a description of alternative services.
Quando você o vê
Rarely seen in practice. Indicates that the request cannot be fulfilled as-is but the user may be reached via an alternative method.
Como corrigir
Check the response body for alternative service descriptions and attempt to reach the user through those channels.
Diferenças principais
SIP 301: The user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header.
SIP 380: The call was not successful but alternative services are possible. The response body contains a description of alternative services.
You encounter 301 when when a user has permanently changed their SIP address. All future calls should be directed to the new URI.
You encounter 380 when rarely seen in practice. Indicates that the request cannot be fulfilled as-is but the user may be reached via an alternative method.
Quando usar qual
For 301 (Moved Permanently): Update your address book or routing tables to use the new Contact URI provided in the response. For 380 (Alternative Service): Check the response body for alternative service descriptions and attempt to reach the user through those channels.