SIP 204 No Notification vs 607 Unwanted
SIP 204 (No Notification) is a 2xx Success response, while 607 (Unwanted) is a 6xx Global 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, 607 means that the called party did not want this call from the calling party. This response is used for robocall and spam call blocking.
Descripción
The request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request.
Cuándo lo verás
When subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
Cómo solucionarlo
No fix needed. The subscription was accepted but there is no state change to notify about yet.
Descripción
The called party did not want this call from the calling party. This response is used for robocall and spam call blocking.
Cuándo lo verás
When the callee's system identifies the call as spam or unwanted. Used in STIR/SHAKEN call verification frameworks.
Cómo solucionarlo
If you are a legitimate caller being blocked as spam, ensure your STIR/SHAKEN attestation level is 'A' (full attestation). Contact the callee through alternative means.
Diferencias clave
204 is a 2xx Success response, while 607 is a 6xx Global Failure response.
SIP 204: The request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request.
SIP 607: The called party did not want this call from the calling party. This response is used for robocall and spam call blocking.
You encounter 204 when when subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
You encounter 607 when when the callee's system identifies the call as spam or unwanted. Used in STIR/SHAKEN call verification frameworks.
Cuándo usar cada uno
For 204 (No Notification): No fix needed. The subscription was accepted but there is no state change to notify about yet. For 607 (Unwanted): If you are a legitimate caller being blocked as spam, ensure your STIR/SHAKEN attestation level is 'A' (full attestation). Contact the callee through alternative means.