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.

متى ترى هذا الرمز

When the callee explicitly declines the call. This is an active rejection, not a busy or unavailable state.

كيفية الإصلاح

The callee has declined. Respect their decision. Consider alternative communication methods (email, messaging).

المواصفات

عرض RFC / المواصفات →

الرموز ذات الصلة

600 Busy Everywhere SIP

قارن مع

100 Trying 180 Ringing 181 Call Is Being Forwarded 182 Queued 183 Session Progress 199 Early Dialog Terminated 200 OK 202 Accepted 204 No Notification 300 Multiple Choices 301 Moved Permanently 302 Moved Temporarily

الأدلة

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

المصطلحات

Status Code Request Method (HTTP Verb) TLS Handshake Authentication TCP/IP Port Number NAT (Network Address Translation) Socket Request-Response Model RFC (Request for Comments) Connection-Oriented Full-Duplex SRV Record SIP Dialog Signaling SIP Registrar STUN (Session Traversal Utilities for NAT) TURN (Traversal Using Relays around NAT) SDP (Session Description Protocol) SIP INVITE SIP Proxy Server SIP Redirect Server SIP Transaction SIP User Agent SIP Trunk RTP (Real-time Transport Protocol) SRTP (Secure Real-time Transport Protocol) SIP ACK SIP BYE SIP CANCEL SIP OPTIONS SIP SUBSCRIBE/NOTIFY B2BUA (Back-to-Back User Agent) SBC (Session Border Controller) Codec Negotiation SIP Response Classes VoIP (Voice over IP) Presence (SIP) PBX (Private Branch Exchange) MFA (Multi-Factor Authentication) TLS Versions