422
SIP
422 Session Interval Too Small
The request's Session-Expires value is too small. The Min-SE header in the response indicates the minimum acceptable session interval.
On this page
When You See This Code
When using SIP session timers (RFC 4028) and the proposed session refresh interval is below the server's minimum.
How to Fix
Increase the Session-Expires value to at least the value indicated in the Min-SE header of the 422 response.
Specification
Compare With
Guides
401 Unauthorized vs 403 Forbidden: When to Use Each
Security & Authentication
SIP Response Codes: Understanding VoIP Call Flow
Real-Time Protocols
SIP Call Flow: Understanding Session Setup
Real-Time Protocols
WebRTC Signaling with SIP and WebSocket
Real-Time Protocols
RFC 3261: SIP Protocol Deep Dive
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TLS 1.3: Faster, Simpler, More Secure
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Frequently Asked Questions
What is SIP 422 Session Interval Too Small?
The request's Session-Expires value is too small. The Min-SE header in the response indicates the minimum acceptable session interval.
When do you see SIP 422 Session Interval Too Small?
When using SIP session timers (RFC 4028) and the proposed session refresh interval is below the server's minimum.
How to fix SIP 422 Session Interval Too Small?
Increase the Session-Expires value to at least the value indicated in the Min-SE header of the 422 response.