SIP 100 Trying vs 608 Rejected
SIP 100 (Trying) is a 1xx Provisional response, while 608 (Rejected) is a 6xx Global Failure response. 100 indicates that the request has been received by the next-hop server and an unspecified action is being taken to process it. The UAC should expect additional responses. 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.
Beschreibung
The request has been received by the next-hop server and an unspecified action is being taken to process it. The UAC should expect additional responses.
Wann Sie es sehen
Immediately after sending an INVITE. The proxy has received the call and is searching for the callee. This is the SIP equivalent of a dial tone.
Wie man es behebt
No fix needed — this is normal call setup behavior. If stuck on 100 Trying for too long, check network connectivity and proxy configuration.
Beschreibung
An intermediary machine or process rejected the call attempt. Similar to 607 but the rejection comes from the network rather than the end user.
Wann Sie es sehen
When a network element (not the callee) blocks the call. Used by analytics engines and call-blocking services in the network path.
Wie man es behebt
This is a network-level block. Contact the network administrator or carrier to understand why the call was blocked.
Wesentliche Unterschiede
100 is a 1xx Provisional response, while 608 is a 6xx Global Failure response.
SIP 100: The request has been received by the next-hop server and an unspecified action is being taken to process it. The UAC should expect additional responses.
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 100 when immediately after sending an INVITE. The proxy has received the call and is searching for the callee. This is the SIP equivalent of a dial tone.
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.
Wann welchen verwenden
For 100 (Trying): No fix needed — this is normal call setup behavior. If stuck on 100 Trying for too long, check network connectivity and proxy configuration. For 608 (Rejected): This is a network-level block. Contact the network administrator or carrier to understand why the call was blocked.