SIP 300 Multiple Choices vs 423 Interval Too Brief
SIP 300 (Multiple Choices) is a 3xx Redirection response, while 423 (Interval Too Brief) 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, 423 means that the expiration time in the request is too short. The response contains a Min-Expires header indicating the minimum allowed value.
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 expiration time in the request is too short. The response contains a Min-Expires header indicating the minimum allowed value.
Quando você o vê
When a REGISTER or SUBSCRIBE request has an Expires value that is below the server's minimum. Common with aggressive keep-alive timers.
Como corrigir
Increase the Expires header value to at least the Min-Expires value from the response.
Diferenças principais
300 is a 3xx Redirection response, while 423 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 423: The expiration time in the request is too short. The response contains a Min-Expires header indicating the minimum allowed value.
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 423 when when a REGISTER or SUBSCRIBE request has an Expires value that is below the server's minimum. Common with aggressive keep-alive timers.
Quando usar qual
For 300 (Multiple Choices): Select one of the provided Contact addresses and resend the request to that specific URI. For 423 (Interval Too Brief): Increase the Expires header value to at least the Min-Expires value from the response.