SIP 300 Multiple Choices vs 485 Ambiguous
SIP 300 (Multiple Choices) is a 3xx Redirection response, while 485 (Ambiguous) is a 4xx Client 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, 485 means that the Request-URI was ambiguous. The response body may contain a list of possible unambiguous addresses.
描述
The address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
何时出现
When a user has multiple registered devices or contact addresses and the server cannot determine which one to use.
如何修复
Select one of the provided Contact addresses and resend the request to that specific URI.
描述
The Request-URI was ambiguous. The response body may contain a list of possible unambiguous addresses.
何时出现
When the destination address matches multiple users and the server cannot determine which one is intended.
如何修复
Use a more specific SIP URI. Check the response body for a list of possible matches and select the correct one.
主要区别
300 is a 3xx Redirection response, while 485 is a 4xx Client 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 485: The Request-URI was ambiguous. The response body may contain a list of possible unambiguous addresses.
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 485 when when the destination address matches multiple users and the server cannot determine which one is intended.
何时使用哪个
For 300 (Multiple Choices): Select one of the provided Contact addresses and resend the request to that specific URI. For 485 (Ambiguous): Use a more specific SIP URI. Check the response body for a list of possible matches and select the correct one.