SIP

580 Precondition Failure

The server is unable or unwilling to meet some of the preconditions specified in the request for resource reservation.

On this page

When You See This Code

When using QoS preconditions (RFC 3312) and the network cannot guarantee the required quality of service for the media session.

How to Fix

Relax the precondition requirements or ensure the network path supports the required QoS. Consider removing precondition requirements for best-effort calls.

Specification

View RFC / Specification →

Compare With

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

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 Protocol Deep Dives

TLS 1.3: Faster, Simpler, More Secure Protocol Deep Dives

Glossary

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

Frequently Asked Questions

What is SIP 580 Precondition Failure?

The server is unable or unwilling to meet some of the preconditions specified in the request for resource reservation.

When do you see SIP 580 Precondition Failure?

When using QoS preconditions (RFC 3312) and the network cannot guarantee the required quality of service for the media session.

How to fix SIP 580 Precondition Failure?

Relax the precondition requirements or ensure the network path supports the required QoS. Consider removing precondition requirements for best-effort calls.