SIP 300 Multiple Choices vs 604 Does Not Exist Anywhere
SIP 300 (Multiple Choices) is a 3xx Redirection response, while 604 (Does Not Exist Anywhere) is a 6xx Global Failure response. 300 indicates that the address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint. 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.
Descrição
The address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
Quando você o vê
When a user has multiple registered devices or contact addresses and the server cannot determine which one to use.
Como corrigir
Select one of the provided Contact addresses and resend the request to that specific URI.
Descrição
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.
Quando você o vê
When the user definitively does not exist on any server in the network. The server has authoritative knowledge, not just local.
Como corrigir
The user does not exist. Verify the SIP URI or phone number. Unlike 404, retrying on other servers will not help.
Diferenças principais
300 is a 3xx Redirection response, while 604 is a 6xx Global Failure response.
SIP 300: The address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
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 300 when when a user has multiple registered devices or contact addresses and the server cannot determine which one to use.
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.
Quando usar qual
For 300 (Multiple Choices): Select one of the provided Contact addresses and resend the request to that specific URI. 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.