SIP 204 No Notification vs 608 Rejected
SIP 204 (No Notification) is a 2xx Success response, while 608 (Rejected) 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, 608 means that an intermediary machine or process rejected the call attempt. Similar to 607 but the rejection comes from the network rather than the end user.
Descrição
The request was successful but the server has decided not to send a NOTIFY for this SUBSCRIBE request.
Quando você o vê
When subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
Como corrigir
No fix needed. The subscription was accepted but there is no state change to notify about yet.
Descrição
An intermediary machine or process rejected the call attempt. Similar to 607 but the rejection comes from the network rather than the end user.
Quando você o vê
When a network element (not the callee) blocks the call. Used by analytics engines and call-blocking services in the network path.
Como corrigir
This is a network-level block. Contact the network administrator or carrier to understand why the call was blocked.
Diferenças principais
204 is a 2xx Success response, while 608 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 608: An intermediary machine or process rejected the call attempt. Similar to 607 but the rejection comes from the network rather than the end user.
You encounter 204 when when subscribing to event packages that may not generate immediate notifications, such as dialog or presence packages.
You encounter 608 when when a network element (not the callee) blocks the call. Used by analytics engines and call-blocking services in the network path.
Quando usar qual
For 204 (No Notification): No fix needed. The subscription was accepted but there is no state change to notify about yet. For 608 (Rejected): This is a network-level block. Contact the network administrator or carrier to understand why the call was blocked.