SIP 300 Multiple Choices vs 489 Bad Event
SIP 300 (Multiple Choices) is a 3xx Redirection response, while 489 (Bad Event) 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, 489 means that the server did not understand the event package specified in the Event header of a SUBSCRIBE request.
Açıklama
The address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
Gördüğünüzde
When a user has multiple registered devices or contact addresses and the server cannot determine which one to use.
Nasıl Düzeltilir
Select one of the provided Contact addresses and resend the request to that specific URI.
Açıklama
The server did not understand the event package specified in the Event header of a SUBSCRIBE request.
Gördüğünüzde
When subscribing to an event package that the server does not support (e.g., dialog, presence, message-summary).
Nasıl Düzeltilir
Check which event packages the server supports (OPTIONS request) and use a supported event package name.
Temel Farklar
300 is a 3xx Redirection response, while 489 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 489: The server did not understand the event package specified in the Event header of a SUBSCRIBE request.
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 489 when when subscribing to an event package that the server does not support (e.g., dialog, presence, message-summary).
Hangisini Ne Zaman Kullanmalı
For 300 (Multiple Choices): Select one of the provided Contact addresses and resend the request to that specific URI. For 489 (Bad Event): Check which event packages the server supports (OPTIONS request) and use a supported event package name.