422 4xx Client error RFC 4028
SIP 422 Session Interval Too Small
The Session-Expires value in the request is lower than the server's minimum. The response carries Min-SE.
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Common causes
- Session timer settings below the peer's minimum (often 90 seconds or more).
How to fix it
- Increase the session-expires setting (for example to 1800 seconds). Most stacks retry automatically using Min-SE.
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About 4xx responses
The request has a problem or cannot be completed at this server, usually because of something on the requesting side or the target user.