- Firmware version: Any
- Model: S-Series
When registering a SIP Trunk gets SIPresponse from the SIP provider '423 Interval Too Brief', then the registration failed.
423 Interval Too Brief explaination.
The server is rejecting the request because the expiration time of the resource refreshed by the request is too short. This response can be used by a registrar to reject a registration whose Contact header field expiration time was too small.
Below is an example, when registering the SIP trunk gets '423 Interval Too Brief' and the SIP provider requires the 'Min-Expires' should be 180 seconds.
The reason is the 'Min-Expires' doesn't meet the SIP provider requirement.
Then we can adjust it in the menu 'PBX->General->SIP->Outbound SIP Registration->Default Incoming/Outgoing Registration Time' to 180 seconds.