SIP 204 No Notification vs 408 Request Timeout
SIP 204 (No Notification) is a 2xx Success response, while 408 (Request Timeout) is a 4xx Client Failure response. 204 indicates that the request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request. In contrast, 408 means that the server could not produce a response within a suitable time. The client may repeat the request without modifications at any later time.
Beschreibung
The request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request.
Wann Sie es sehen
When subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
Wie man es behebt
No fix needed. The subscription was accepted but there is no state change to notify about yet.
Beschreibung
The server could not produce a response within a suitable time. The client may repeat the request without modifications at any later time.
Wann Sie es sehen
When the callee does not respond within the configured timeout (e.g., phone rings but is never answered, or the endpoint is unreachable).
Wie man es behebt
Check if the callee's device is powered on and registered. Verify network connectivity. Consider adjusting the server's transaction timeout value.
Wesentliche Unterschiede
204 is a 2xx Success response, while 408 is a 4xx Client Failure response.
SIP 204: The request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request.
SIP 408: The server could not produce a response within a suitable time. The client may repeat the request without modifications at any later time.
You encounter 204 when when subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
You encounter 408 when when the callee does not respond within the configured timeout (e.g., phone rings but is never answered, or the endpoint is unreachable).
Wann welchen verwenden
For 204 (No Notification): No fix needed. The subscription was accepted but there is no state change to notify about yet. For 408 (Request Timeout): Check if the callee's device is powered on and registered. Verify network connectivity. Consider adjusting the server's transaction timeout value.