SIP
423 Interval Too Brief
The expiration time in the request is too short. The response contains a Min-Expires header indicating the minimum allowed value.
이 코드를 보게 되는 경우
When a REGISTER or SUBSCRIBE request has an Expires value that is below the server's minimum. Common with aggressive keep-alive timers.
해결 방법
Increase the Expires header value to at least the Min-Expires value from the response.