SIP 300 Multiple Choices vs 416 Unsupported URI Scheme
SIP 300 (Multiple Choices) is a 3xx Redirection response, while 416 (Unsupported URI Scheme) 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, 416 means that the server cannot process the request because the URI scheme in the Request-URI is unknown to the server.
Описание
The address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
Когда вы это видите
When a user has multiple registered devices or contact addresses and the server cannot determine which one to use.
Как исправить
Select one of the provided Contact addresses and resend the request to that specific URI.
Описание
The server cannot process the request because the URI scheme in the Request-URI is unknown to the server.
Когда вы это видите
When using a URI scheme (e.g., tel:, im:, pres:) that the receiving server does not support.
Как исправить
Use a supported URI scheme. Most SIP servers support sip: and sips: schemes. Check server capabilities with OPTIONS.
Ключевые различия
300 is a 3xx Redirection response, while 416 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 416: The server cannot process the request because the URI scheme in the Request-URI is unknown to the server.
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 416 when when using a URI scheme (e.g., tel:, im:, pres:) that the receiving server does not support.
Когда что использовать
For 300 (Multiple Choices): Select one of the provided Contact addresses and resend the request to that specific URI. For 416 (Unsupported URI Scheme): Use a supported URI scheme. Most SIP servers support sip: and sips: schemes. Check server capabilities with OPTIONS.