603
SIP
603 Decline
The callee's machine was contacted successfully but the user explicitly does not wish to or cannot participate. Unlike 600, this may be because the callee doesn't want to communicate, not necessarily because they're busy.
Когда вы видите этот код
When the callee explicitly declines the call. This is an active rejection, not a busy or unavailable state.
Как исправить
The callee has declined. Respect their decision. Consider alternative communication methods (email, messaging).
Спецификация
Связанные коды
Сравнить с
Руководства
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
Protocol Deep Dives
TLS 1.3: Faster, Simpler, More Secure
Protocol Deep Dives
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