SIP 300 Multiple Choices vs 415 Unsupported Media Type
SIP 300 (Multiple Choices) is a 3xx Redirection response, while 415 (Unsupported Media Type) 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, 415 means that the server is refusing the request because the message body is in a format not supported by the server for the requested method.
Descripción
The address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
Cuándo lo verás
When a user has multiple registered devices or contact addresses and the server cannot determine which one to use.
Cómo solucionarlo
Select one of the provided Contact addresses and resend the request to that specific URI.
Descripción
The server is refusing the request because the message body is in a format not supported by the server for the requested method.
Cuándo lo verás
When the Content-Type of the request body is not supported. For INVITE, this often means an unsupported SDP format.
Cómo solucionarlo
Check the Accept header in the response to see supported media types. Use a compatible Content-Type in your request.
Diferencias clave
300 is a 3xx Redirection response, while 415 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 415: The server is refusing the request because the message body is in a format not supported by the server for the requested method.
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 415 when when the Content-Type of the request body is not supported. For INVITE, this often means an unsupported SDP format.
Cuándo usar cada uno
For 300 (Multiple Choices): Select one of the provided Contact addresses and resend the request to that specific URI. For 415 (Unsupported Media Type): Check the Accept header in the response to see supported media types. Use a compatible Content-Type in your request.